What three mechanisms regulate the heart?

Answers

Answer 1
The three mechanisms which regulate the heart are endocrine, cardiovascular and Sinoatrial nodes.
The endocrine system consists of the glands and hormones of the human body. The cardiovascular system is the organ system which is responsible for the circulation of the blood around the body and the oxygenation of the body's tissues. The sinoatrial node (SA node) generates the electrical impulses and is considered the natural pacemaker of the heart.

Related Questions

Large blood vessels that carry blood away from the heart to body tissues are called

Answers

The Answer is The Arteries

What common bone structure is shared in the forelimbs of the lobe fin fish and amphibians?

Answers

The common bone structure that is shared in the forelimbs of the lobe fin fish and amphibians are the humerus, radius, ulna, and finger bones. Tetrapods are related by the presence of the named bones. Tetrapods includes all limbed vertebrates constituting the classes Amphibian, Reptilia, Aves, Mammalia. 

when grass is cut with a lawn mower, it gives off a distinct aroma. why does newly-mowed grass smell a little bit sweet?

Answers

It may smell pleasant but the plants are releasing stress signals called green leaf volatiles (GLV). this is an adaptation to warn other grass patches of the 'impending danger '. These compounds also help the grass heal it's wounds faster and prevent infections by pathogens.

Answer:

When the grass leaves are cut, a small amount of sugar is produced at the site of injury to plug the phloem.

Explanation:

I took the test and it's the correct answer hope it helps!

The fluid in glomerular capsule is similar to plasma except that it does not contain a significant amount of ________.the glomerulus differs from other capillaries in the body in that it ________. the glomerulus differs from other capillaries in the body in that it ________. is drained by an efferent arteriole is impermeable to most substances has a basement membrane has a blood pressure much lower than other organ systems

Answers

The fluid in glomerular capsule is similar to plasma except that it does not contain a significant amount of plasma protein. The glomerulus differs from other capillaries in the body in that it is drained by an efferent arteriole. Glomerulus and the Bowman's capsule constitute a renal corpuscle, the basic filtration unit of the kidney. The glomerular filtration rate is the rate at which blood is filtered through the glomeruli, and thus measures the renal overall renal function.
Final answer:

The fluid in the glomerular capsule is like plasma but lacks significant protein. The glomerulus distinguishes itself from other body capillaries in that an efferent arteriole drains it and maintains a higher blood pressure, facilitating efficient blood filtration.

Explanation:

The fluid in the glomerular capsule (also known as Bowman's capsule) is similar to plasma except that it does not contain a significant amount of proteins. This is because the filtration membrane separates the blood in the glomerular capillaries, and the capsular space allows small substances such as water, ions, and glucose to pass through but blocks larger ones like proteins and blood cells.

The glomerulus differs from other capillaries in the body in two main respects. Firstly, it is drained by an efferent arteriole, which is unique because, in general, capillaries merge into venules, not arterioles. Secondly, the glomerulus has a significantly higher blood pressure than other capillaries due to its position between two arterioles (afferent and efferent arterioles). This high pressure allows for the rapid and efficient filtration of blood.

Learn more about Glomerulus here:

https://brainly.com/question/32150249

#SPJ3

When compared to the leg muscles of an olympic sprinter, the muscles of an olympic marathoner would likely show a greater proportion of oxidative slow-twitch fibers?

Answers

This is a true statement.
The human body has two types of skeletal muscle fibers: slow-twitch and fast-twitch. Slow-twitch fibers are used for long-endurance actions, such as a marathon, while fast-twitch fibers are used for sudden bursts of movements such as a sprint. Therefore, an Olympic marathoner will have a greater proportion of oxidative slow-twitch fibers when compared to an Olympic sprinter.

Plant hormones can have different effects at different concentrations. this explains how ________.

Answers

Plant hormones can have different effects at different concentrations. This explains how

auxin can stimulate cell elongation in apical meristems, yet will inhibit the growth of axillary buds

Concentration produce different effects on plant hormones which explains why auxin at low concentration induce growth in apical meristems but at higher concentrations inhibit growth of axillary buds.

What are plant hormones?

Plant hormones are chemical substances produced by plants which modify and regulate the growth and development of plants.

Plants hormones include the following:

auxin abscissic acid ethylene

Plant hormones can have different effects at different concentrations. At higher concentrations they may have inhibitory effects while at low concentrations, they may have stimulatory effects.

For example auxin at low concentration induce growth in apical meristems while at higher concentrations, they inhibit growth of axillary buds.

Therefore, concentration produce different effects on plant hormones.

Learn more about plant hormones at: https://brainly.com/question/4411944

The ________ is not adequate for searching through large arrays

Answers

The linear/ sequential search algorithm is not adequate for searching though large arrays

Hope this helps!

algorithm

hope this helps (and that it is right)

What happens if the human egg is not fertilized? see section 42.2 (page 797) . view available hint(s) what happens if the human egg is not fertilized? see section 42.2 (page 797) . the egg is retained within the ovary. the corpus luteum degenerates. another egg will be ovulated immediately. chorionic gonadotropin levels increase?

Answers

if the egg is not fertilized the woman will have a period, and then we have to deal with rage monsters for a week.

The pancreas belongs to what part of the digestive system (alimentary canal/accessory organ)

Answers

The pancreas is an accessory organ of the digestive system (alimentary canal includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus). The pancreas is a glandular organ which produces glucagon, somatostatin, and pancreatic polypeptide and also digestive organ because it secreting pancreatic juice and digestive enzymes that assist digestion and absorption of nutrients in the small intestine.

The pancreas belongs to the accessory organ part of the digestive system.

The digestive system is made up of the alimentary canal and the accessory organs of digestion which include the pancreas, gallbladder, liver, salivary glands and tongue. The pancreas is an endocrine organ that is located in the left upper region of the abdomen.






Where are new skin cells produce to replace old cells that have been shed?

Answers

The production of the new skin cells occurs at the basal layer of the epidermis.

The skin is composed of three layers:

1. The epidermis- The outermost layer of the skin. Waterproof with the protective role and which serves as a barrier to infection. It also has its own layers (from the top): stratum corneum, stratum lucidum (only on hands and bottoms of feet), stratum granulosum, stratum spinosum, stratum basale.

The cells of stratum basale are constantly going through mitosis to produce new cells (keratinocytes) and as new cells are formed, the existing cells are pushed superficially away from the stratum basale.

2. The dermis,

3. The hypodermis.

i can confirm this is the answer.



The production of the new skin cells occurs at the basal layer of the epidermis.The skin is composed of three layers:1. The epidermis- The outermost layer of the skin. Waterproof with the protective role and which serves as a barrier to infection. It also has its own layers (from the top): stratum corneum, stratum lucidum (only on hands and bottoms of feet), stratum granulosum, stratum spinosum, stratum basale.The cells of stratum basale are constantly going through mitosis to produce new cells (keratinocytes) and as new cells are formed, the existing cells are pushed superficially away from the stratum basale.2. The dermis,3. The hypodermis.

A particular cell has half as much dna as some of the other cells in a mitotically active tissue. the cell in question is most likely in?

Answers

 your answer is a. G1

Which feature is characteristic of estuaries

Answers

Final answer:

Estuaries are unique environments where fresh and salt water meet, creating a diluted saltwater habitat. They provide protected areas for the breeding and development of various marine species. The organisms found in estuaries have developed adaptations to cope with the varying salinity conditions.

Explanation:

The main characteristic of estuaries is that they are biomes where a source of fresh water, such as a river, meets the ocean. As a result, both fresh water and salt water are found in the same vicinity, and their mixing creates a diluted (brackish) saltwater. This makes estuaries unique and complex environments that host a variety of marine and terrestrial organisms.

Another specific feature of estuaries is that they act as breeding grounds and nurseries for various marine species such as crustaceans, mollusks, and fishes. These species have developed behavioral and physiological adaptations to cope with the rapidly changing salinity conditions that occur in estuaries. For example, many estuarine plant species are halophytes, meaning they can tolerate salty conditions. Furthermore, some mollusks and clams in this biome have adaptations that allow them to switch between aerobic and anaerobic respiration depending on the salinity and oxygen content of the water.

Learn more about Estuaries here:

https://brainly.com/question/14681370

#SPJ12

Final answer:

Estuaries are unique brackish biomes where freshwater and saltwater interact. They house and support various species, which have evolved specific adaptations to handle changing salinity levels. Key factors affecting estuaries' ecological dynamics include tidal shifts and flow rate of freshwater sources.

Explanation:

Estuaries are characterized by the unique intermingling of freshwater and saltwater, creating a brackish water biome where rivers meet the ocean. This environment serves as a protected area and breeding ground for various organisms, including the young offsprings of crustaceans, mollusks, and fish. The salinity in estuaries, which is influenced by the flow rate of freshwater sources and the daily tidal shifts, is a major factor affecting the types of organisms found here and their adaptations to survive.

Both plant and animal species in estuaries have developed various adaptations to deal with the changing salinity. Many estuarine plants are halophytes, which can tolerate salty conditions by filtering out salt from the water they absorb. Mussels and clams, for example, switch from aerobic to anaerobic respiration when exposed to low salinity and revert when high tide returns, increasing the salinity and oxygen content of the water.

Learn more about Estuaries here:

https://brainly.com/question/14681370

#SPJ12

In ________ a single sperm cell from the man is injected using a microscopic needle, directly into each harvested egg from the woman. the resulting zygote is then transferred after a few days into the woman's uterus

Answers

In in vitro fertilization (IVF) a single sperm cell from the man is injected using a microscopic needle, directly into each harvested egg from the woman. The resulting zygote is then transferred after a few days into the woman's uterus.   IVF is a type of assisted reproductive technology used for infertility treatment. It includes the steps like removing an ovum from the woman's ovaries, fertilisation (sperm and ovum co-incubation) outside the body, embryo transfer to the same or another woman's uterus.

Heartburn results when the acidic contents of the stomach regurtitate into the esophagus

Answers

Heartburn is a burning discomfort that is generally felt in the chest just behind the breastbone.  The burning sensation is caused when harsh stomach juices come in contact with and irritate the delicate lining of the esophagus.

In theory, a population grows most quickly at ____ % of the environment's carrying capacity

Answers

The answer to this question is 50%

Your roommate is 5' 1" and weighs 100 lbs what bmi category would she be in

Answers

In this hypothetical situation the roommate would have a BMI of 18.9 which would be labeled as a Normal range of BMI.

Any chemical, physical, or biological changes in the environment that harms living organisms is called

Answers

The answer is - environmental hazard.
An environmental hazard represents a substance, as state or an event that has the potential to threaten the surrounding natural environment, or adversely affect the health of the people, also including pollution and natural disasters such as storms and earthquakes.

A scientist finds the bones of a dinosaur. what could help the scientist determine the approximate age of the dinosaur bones

Answers

The biggest help for the scientists may be provided by the ground layer in which the bones were found. If the layer of ground is not disturbed, than the scientist can easily see the time periods from the structure and color of the ground, and thus determine the time period from when the fossil originates and the approximate age of it.

Answer:

Explanation:

the kinds of trees living in the area of the bones

What evidence would you need to show that genetic diversity is the result of reproductive character displacement?

Answers

Character displacement – trait evolution stemming from selection to lessen resource competition or reproductive interactions between species – has long been viewed as an important mechanism for enabling closely related species to coexist.

Respiratory organs have large surface areas. how is this an advantage to an animal?

Answers

Large respiratory surface areas help an organism to have a more efficient gas exchange. The respiratory surface consists of an alveolar epithelial cell and a pulmonary capillary endothelial cell and it enables the movement of O2 and CO2 through it. The movement goes from the alveolar air into the blood for the O2, while CO2 moves in the opposite direction. With larger surface area more erythrocytes can pass and the more O2 can be received.

when did the human population begin to grow at a faster rate than at any other time in history

Answers

During the industrial revolution, the population of the Western world started to increase quickly. Since the 1950s, the population of the world has increased significantly.

Which period saw the fastest growth in the human population?

The world population doubled at the quickest rate between 1950 and 1987, growing from 2.5 to 5 billion people in just 37 years. This represents a population increase of around one generation. During this time, population growth peaked in 1962 at 2.1%.

When did the exponential growth of the human population begin?

The population doubled in the 19th century, tripled in the 20th century, and reached 6 billion in the year 2000. This exponential increase was caused by breakthroughs in medicine, science, and the economy.

To know more about population visit:-

https://brainly.com/question/28780566

#SPJ1

Final answer:

The human population began growing at an unprecedented rate during the Industrial Revolution in the late 18th century, accelerating during the 20th century, primarily due to technological, agricultural, and medical advancements that improved living conditions and life expectancy.

Explanation:

The human population began to grow at a faster rate than at any other time in history around the start of the Industrial Revolution in the late 18th century. This marked the beginning of what is often called the population explosion. Advancements in technology, agriculture, and medicine have all contributed to exponential growth. The global population growth rate accelerated further during the 20th century and continues to grow in the 21st century. The shift from very slow growth to rapid increase can be visualized by the shape of a J-curve in population graphs.

For example, it took millennia for the human population to reach 1 billion around 1800 CE, and only a little over a century later, the population reached 2 billion. Within less than another century, an additional 5 billion were added, showcasing the exponential nature of recent population growth. Scientific advancements and industrialization played significant roles in creating conditions for the population to grow at previously unseen rates, which includes improved health care, increased food production, and better sanitation.

What is an allele? a dna sequence different versions of a gene a hairstyle a physical trait?

Answers

i believe the answer is different versions of a gene :)

Which of the following personal health practices should a person follow to prevent obesity? A) Limit spending time outdoors in summers. B) Have a balanced diet and exercise regularly. C) Wash hands frequently to maintain proper hygiene. D) Get the DNA modified to replace the faulty gene.

Answers

Answer:

def B

Explanation:

The personal health practices that should a person follow to prevent obesity are having a balanced diet and exercising regularly. The correct option is B.

What is obesity?

Obesity is a body condition in which the body becomes overweight because you eat more than your body's requirements. It is harmful to the health of the person because it generates many diseases.

Personal health practices are the practices that a person does for their good health of them. These practices include eating nutritious food and exercise which keep the body fit.

Eating a balanced diet means including all nutrients in it and doing regular exercise to maintain health and keep the body out of obesity.

Thus, the option is B. Have a balanced diet and exercise regularly.

To learn more about obesity, refer to the link:

https://brainly.com/question/14271717

#SPJ5

Treatment aims to _____ a disease or reduce the severity of its signs and symptoms.

Answers

Treatment aims to cure a disease or reduce the severity of its signs and symptoms.

Answer:

The correct answer is - cure.

Explanation:

Treatment is medical care or practice to provide relief to the person that is ill or sick. It includes the administration of medicinal doses.

The aim of medical or clinical treatment is to cure the disease, illness or injury of the patient by medicine or medical care. Treatment for a concerned illness is to reduce the severity of it's a sign and symptoms.

Thus, the correct answer is - cure.

Cold sores are caused by the herpes simplex virus type 1. a company that wants to develop antiviral drugs would ask a research immunologist to study —

Answers

The company that wants to develop antiviral drugs would ask a research immunologist to study the mechanism used by the virus to infect cells. Oral herpes is a viral infection mainly of the mouth area and lips caused by specific type of the herpes simplex virus. It is also termed as the HSV-1, type 1 herpes simplex virus, or herpes labialis. Herpes simplex virus entry or penetration into cells may be a highly complex process and the mechanism of entry may demonstrate unique cell-types specificities. 

Answer:

the answer is A

Explanation:

Which disease is characterized by porous bones? osteomalacia rickets osteosarcoma osteoporosis?

Answers

Its Osteoporosis, also known as porous bones. Which is characterized by weak brittle bones and low bone mass. Both men and women are affected by this disease.

Heterozygous alleles are found on ________ chromosomes

Answers

24 pairs of chromosomes

Answer is Homologous.

A diploid individual having two different alleles for a specific trait is called heterozygous. An allele is the alternative form of the same gene. The cells in diploid organisms contain sets of homologous chromosomes, which are paired chromosomes. Each chromosome of a homologous pair has the same genes on the same positions. Although homologous chromosomes have the same genes, they may have different alleles for those genes.  

Example: The gene for seed color trait in a pea plant exists in pair. One gene or allele for yellow seed (R) and the other for green seed color (r). A heterozygous plant would contain alleles for seed color (Rr). Gene R is present one chromosome and its allele (r) is present on the other chromosome of the homologous pair.  


The sequencing of mitochondrial dna to trace changes in human ancestors over time involves which specialization of anthropology?

Answers

For the answer tot he questions above, the answer is "paleoanthropology"

It is also called human paleontology. It is a branch of anthropology that is concerned with the origins and development of the early humans.
I hope my answer helped you.

Water-soluble nutrients absorbed into the blood are routed directly from the small intestine through the portal vein to the __________ before any other organ.:

Answers

Water-soluble nutrients stored in blood are routed directly from the small intestine through the portal vein to the liver before any other organ. The portal vein or hepatic portal vein is a blood vessel which carries blood from the GI tract, to the liver. The blood contains nutrients and toxins extracted from digested contents. The portal vein is not a true vein, since it conducts blood to capillary beds in the liver and not directly to the heart. It is the main component of the hepatic portal system.

Final answer:

Water-soluble nutrients absorbed from the small intestine are sent directly to the liver via the portal vein for processing before reaching other parts of the body.

Explanation:

Water-soluble nutrients that are absorbed into the blood are sent directly from the small intestine through the portal vein to the liver before any other organ. The hepatic portal system is a critical component in the body's nutrient distribution system, where the liver acts as a processing plant. Nutrient-rich blood from the small intestine, where most absorption occurs, reaches the liver for detoxification, storage, or metabolic processing before being circulated to the heart and throughout the body.

A pregnant woman who is a vegan needs to take ______ nutrient supplements.

Answers

A pregnant woman who is a vegan needs to take calcium and iron nutrient supplements. When a woman is pregnant the developing fetus needs a lot of calcium to build bones and teeth. It also helps the baby to grow a healthy heart, nerves, and muscles as well as develop a normal heart rhythm and blood-clotting abilities. Iron is also important as the woman body would need it to make extra blood for the mother and the baby during pregnancy. 
Other Questions
Which of these is the best description of "hoovervilles"?a.shantytowns in which homeless families lived during the great depressionb.housing projects associated with poverty and were constructed in urban areasc.the first planned suburbs which were developed in the period after world war id.nickname for the department of housing and urban development during the new deal? A work cell is scheduled to build 120 digital light processor (dlp) assemblies each week. these assemblies are later installed into home theater projection systems. the work cell has 7.5 hours of productive work each day, six days per week. what is takt time for this cell? express your answer in minutes rounded to one decimal place. It is best to be an aggressive communicator because then you will always get what you desire. Please select the best answer from the choices provided. T F Sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. Lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test. What is the mean of Sara's reading test? What is the mean of Lee's reading test? please help with both questions. Is ice a silicate or a non silicate? The average number of mosquitoes in a stagnant pond is 70 per square meter with a standard deviation of 8 per square meter. if one square meter of the pond is chosen at random for a mosquito count, find the probability that the average of the count is more than 68 mosquitoes per square meter. assume that the variable is normally distributed. Many activists who oppose the trend toward globalization claim that it In 2015, North Shore Community College had a total student body that was 5% more than in 2014. The enrollment in 2015 was 4,200. How many students attended the college in 2014? (Round to the nearest whole number.) A. 2,800 B. 3,680 C. 2,680 D. 4,000 is it true that Most health care providers have a negative Medicare margin as compared to the positive margin that exists for ambulance service. the creation of NATO and the Warsaw pact best illustrate which cold war belief? Which would be most useful if you were lost in the Sahara desert? A. Landsat satellite B.OSTM/Jason-2 satellite C. Global Positioning System D. topographic map of Africa What is the role of ADH (antidiuretic hormone) in regulating salt and water concentrations in the blood?A.) It detects a high concentration of salts in the blood and signals the pituitary glands to release more water into the blood.B.) It prompts the kidneys to reabsorb more water into the bloodstream to dilute the salts.C.) It inhibits the skin to sweat. This retains more water into the bloodstream to dilute the salts. four-barrel of colored marbles you randomly select three blue to Yellow 7 red eight green and two purple marbles. find the experimental probability of randomly selecting either green or purple marbleStandard number cube is rolled 180 times. Predict how many times 3 or 5 will be the resultThe movie open the other day. So far 500,000 people have seen it. the producers of the movie needed to know if the people liked it. a random sample of 8000 people were asked as they were leaving the theater if they like the movie. of those interviewed 4,200 enjoyed the movie. predict the total number of people who have enjoyed the movie. Jamestown Builders has a development of new homes. there are 6 different floor plans 7 exterior color than an option of either one car or two car garage . How many choices are there for one home? if no digit may be used more than once how many 5 digits can be formed using only three digits. 8 1 2 5 and7? Communicating openly and honestly is one of the steps to Although they had been talking online for 6 months, John felt some trepidation about meeting Luisa face to face. Past girlfriends had called him insensitive, and one had even claimed he was thoughtless In a four stroke engine, the piston compresses the gas mixture during the ______ stroke. What evidence supports the statement "The average citizen is more burdened by taxes than are businesses in Georgia"? what was george washington's job to do in the millatary? A researcher is designing a laboratory experiment to determine whether the inorganic substance A affects the rate of a reaction between two colored liquids, X and Y. When the reaction is complete, the liquid is clear. The reaction between X and Y is similar to one used by manufacturers to produce certain chemicals in factories. Which method would best answer his question about reaction rate and what will he find out about substance A? First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is a catalyst. First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst. First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is an enzyme. First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is an enzyme. Use the information below to tell when everyone is coming to the school dance tonight. Use the correct form of the verb venir in each response.Marisol (7:30)