When a stressful situation occurs, the brain's hypothalamus activates the sympathetic nervous system.
There are autonomic responses whenever there is any psychological stress condition prepares the body to fight or adapt to it. The response to psychological or physical stress activates the sympathetic nervous system and inhibits the parasympathetic nervous system.
The HPA axis or the hypothalamic-pituitary-adrenal axis responds to stress by releasing cortisol which influences metabolic, immunological and psychological functions. The HPA axis is regulated by several regions of the brain such as prefrontal cortex, hypothalamus, amygdala, limbic system etc.
Tyler wants to know how the growth of tomato plants is affected by the quantities of various gases in the atmosphere. What type of scientific investigation should Tyler conduct in order to accurately answer his question through direct observations? A. Tyler should research tomato plants on the internet. B. Tyler should grow tomato plants in his back yard. C. Tyler should ask a professional gardener about tomato plants. D. Tyler should perform a controlled experiment.
Answer:
The correct answer is D. Tyler should perform a controlled experiment.
Decomposers are part of a special class of consumers called
Why is a larger nucleus generally less stable than a smaller nucleus?
within the ovary, progesterone is produced by the
Philippe bouchet and colleagues conducted a massive survey of marine mollusks on the west coast of new caledonia. twenty percent of the species found had only a single specimen collected. what does that suggest about the diversity of mollusks in this area?
Identify two ways in which animals can reduce the intensity of intraspecific competition
Final answer:
Animals can reduce intraspecific competition by changing behaviors to minimize competition and by niche differentiation, where they use different resources or habitats within the same environment.
Explanation:
Two ways in which animals can reduce the intensity of intraspecific competition include behavior changes and niche differentiation. Firstly, animals can change their behaviors to avoid direct competition for resources, such as switching their active hours to avoid competition for food. Secondly, they can engage in niche differentiation where individuals of the same species exploit different habitats or resources, reducing direct competition. An example of this in interspecific competition is observed in anolis lizards, where specialization in their habitat selection, such as being ground-dwellers or tree-dwellers, decreases the overlap in resource use among different species. Similarly, in intraspecific competition, animals of the same species can evolve different adaptations that allow them to use varied resources or live in different habitats, thus reducing direct competition for the same resources.
Asexual reproduction in which the body breaks into several fragments, which later develop into complete organisms.
The diploid number of chromosomes in dogs is 78. how many chromosomes would you find in a dog egg cell?
A period of time during which a person infected with hiv has no symptoms
Pamela has started to take antibiotics, which kills most of the helpful and harmful bacteria in her body. Her doctor suggested she eat yogurt containing helpful bacteria to reestablish the bacteria in her digestive tract. Why is this important?
Answer: Yogurt contains good bacteria.
Explanation: Taking antibiotics for a longer duration of time kills the good bacteria present in the the gut of the human being. The gut of the human being consists of good bacteria as well as bad bacteria.
The good bacteria present in the gut of the human beings helps in the digestion of the food. Yogurt is a good source of good bacteria as it contains lactobacillus which is known as good bacteria that keeps the gut healthy.
As cold, briny water from the antarctic circulates to the equator, it warms and rises. as it does, this upwelling carries nutrients that produce ____ billion tons of phytoplankton that are eaten by fish and birds. those that are not eaten die, and fall back to the ocean floor, carrying nutrients with them.
Brackish water is water that has extra salt than original water. This may appear from the crossing of seawater by fresh water that may occur in brackish specimen aquifers. The nutrients that produce 45 billion ton phytoplankton. The phytoplankton is bacteria that is a significant autotrophic element of the plankton community and a fundamental component of water that basin ecosystems. Though it is an essential source of food for larger animals as being the first form of food chain.
The proper way to wash hands when handling foods is to:
The presence of the protein albumin in the urine is known as
Final answer:
Albumin in the urine, referred to as proteinuria or albuminuria, is a sign of kidney damage indicating that glomeruli are not properly filtering proteins out of the blood.
Explanation:
The presence of the protein albumin in the urine is an indication that the filtering units of the kidneys, known as glomeruli, are damaged, and this condition is referred to as proteinuria or, more specifically, albuminuria. Protein molecules, including albumin, are usually retained within the glomerular capillaries due to their size, but when the kidneys are damaged, albumin can pass into the urine. This may occur in various health conditions such as diabetic nephropathy, hypertension, or kidney diseases. It is essential to detect and manage albuminuria early to prevent further kidney damage.
The ability of the heart and lungs to supply oxygen to the body is called
A molecule called ___________ is responsible for the rbc's ability to transport oxygen and carbon dioxide.
A metastasis is _________. select one:
a. a secondary tumor in a different part of the body that arises from a cell from the primary tumor.
b. a cell that is dividing in defiance of normal constraints.
c. a part of the primary tumor that has invaded the surrounding tissue.
d. the portion of the cancerous tumor that displays genetic instability.
Julia plants three tomato plants in different types of soil to see which is best for gardening. All three tomato plants are the same variety. They are about the same size at the start of the experiment. Each plant receives the same amount of water each day. The independent variable is the
The independent variable in Julia's experiment is the type of soil. By planting three tomato plants in different types of soil and keeping all other factors the same, Julia can observe and compare the growth of the plants to determine which type of soil is best for gardening.
Explanation:The independent variable in Julia's experiment is the type of soil. In her experiment, Julia is testing how different types of soil affect the growth of tomato plants. The independent variable is the factor that is intentionally changed by the experimenter, which in this case is the different types of soil. By planting three tomato plants in different types of soil and keeping all other factors the same, Julia can observe and compare the growth of the plants to determine which type of soil is best for gardening.
Final answer:
The independent variable in Julia's experiment is the type of soil, which is varied to observe its effect on the growth of tomato plants, with other factors like water and plant size being consistent.
Explanation:
In the context of the experiment described, the independent variable is the type of soil used for growing the tomato plants. An independent variable is the one that is changed or controlled in a scientific experiment to test the effects on the dependent variable. In Julia's case, she is using different types of soil to determine which one leads to the best growth for tomato plants, while keeping other factors such as the amount of water, the size and variety of the plants consistent. Gary's experimental setup also highlights the importance of controlling variables to ensure that the results reflect the effects of the independent variable, which in his experiment is the amount of sunshine. By maintaining consistent conditions such as the amount of water and plant food, as well as the size and type of pot, he aims to ensure that the differences in plant growth can be attributed to the sunlight exposure.
Why is cell theory classified as theory and not a hypothesis
Question 49 not yet answered points out of 1.00 not flaggedflag question question text what sequence of events usually occurs in the process of protein synthesis? select one:
a. rna → protein → dna
b. protein → rna → dna
c. dna → rna → protein
d. rna → dna → protein
Once the chyme begins to enter the duodenum, it must first be _____ before any of the enzymes in the pancreatic juices can be activated.
Once the chyme begins to enter the duodenum, it must first be Neutralized before any of the enzymes in the pancreatic juices can be activated.
Explanation:
Chyme or chymus is the semi-liquid mass of halfway processed sustenance that is excreted by the stomach, through the pyloric valve, into the duodenum. Chyme results from the mechanical and compound breakdown of a bolus and comprise of incompletely processed sustenance, water, hydrochloric acid, and different stomach related catalysts.
Chyme gradually goes through the pyloric sphincter and into the duodenum, where the extraction of supplements starts. With a pH of roughly 2, chyme rising up out of the stomach is exceptionally acidic. The duodenum secretes a hormone, cholecystokinin (CCK), which makes the nerve bladder contract, discharging antacid bile into the duodenum.
The duodenum is a short segment of the small digestive tract situated between the stomach and the small digestive system. The duodenum additionally creates the hormone secretion to invigorate the pancreatic emission of a lot of sodium bicarbonate, which at that point raises pH of the chyme to 7 and this process is called as neutalization of chyme.
This is a muscular tube through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.
Breast milk _____. is more likely than formula to produce allergies is deficient in iron and vitamin c provides antibodies to fight diseases upsets the baby's digestive system more than formula
Breast milk provides antibodies to fight diseases.
Breast milk is produced by mammary glands in the breasts and its main function is feeding an infant. Breast milk is the primary source of nutrition for newborns. The composition of the milk includes immune-boosting white blood cells, as well as stem cells, which can help organs develop, antibodies, proteins, amino-acids, oligosaccharides, growth factors, hormones, enzymes, vitamins, minerals…
Final answer:
Breast milk provides antibodies to fight diseases, which are crucial for the infant's developing immune system
Explanation:
Breast milk provides antibodies to fight diseases, which are crucial for the infant's developing immune system. These antibodies are passed to the infant through breast milk in what is known as active immunity. The immunoglobulins in colostrum and breast milk help increase the newborn's immune defenses. Breast milk contains all the necessary nutrients and hydration that a growing infant requires for the first 4–6 months of life and is tailored to suit each stage of the newborn's development.
The composition of breast milk helps the newborn's digestive system to expel meconium and clear bilirubin and is generally less likely to upset the baby's digestive system than formula. Compared to cow's milk, breast milk has more appropriate levels of fat and lactose for an infant's needs and contains proteins that are easier for the infant to digest. Cow's milk contains more protein and minerals, which are difficult for an infant's immature digestive system to metabolize, and therefore, it should not be given to infants.
A woman who is on a low-carbohydrate diet for weight loss may have difficulty maintaining an adequate level of the b vitamins thiamin, riboflavin, niacin, and folate. what characteristic of her diet would cause this? exclusion of grain foods and cereals exclusion of fruits exclusion of dairy products exclusion of starchy vegetables
Suggest an advantage to being able to tolerate variations in a wide range of environmental factors?
What vessel delivers oxygenated blood to systemic capillaries for gas exchange? what vessel delivers oxygenated blood to systemic capillaries for gas exchange? pulmonary trunk aorta circumflex artery coronary artery?
The stem is responsible for providing support to the plant. A is a type of stem that grows underground. It’s capable of asexual reproduction and food.
The rhizome is a specialized underground stem that facilitates asexual reproduction, nutrient storage, and plant expansion. Its ability to perform these functions makes it a crucial adaptation for survival and growth in various plant species. The correct answer is A. Rhizome.
The stem plays a crucial role in plant structure and function, providing support and transportation of nutrients.
Among the specialized types of stems, the rhizome stands out as an underground stem that performs multiple functions such as asexual reproduction and food storage.
Rhizomes are horizontal, underground stems that typically grow horizontally, allowing plants to spread and colonize new areas. They play a vital role in asexual reproduction by producing new shoots and roots from nodes along their length.
This ability enables plants to propagate and expand their populations rapidly, especially in favorable environmental conditions.
Additionally, rhizomes serve as storage organs for carbohydrates and other essential nutrients. During periods of dormancy or unfavorable conditions, such as winter or drought, plants can rely on the stored energy within rhizomes to sustain growth and survival until conditions improve.
One of the most notable examples of plants with rhizomes is bamboo. Bamboo rhizomes spread extensively underground, enabling the rapid growth and proliferation of bamboo forests. Other examples include ginger, turmeric, and some species of grasses.
The correct answer is A. Rhizome.
Complete question
The stem is responsible for providing support to the plant. ________ is a type of stem that grows underground. It’s capable of asexual reproduction and food storage.
A) Rhizome
B) Stolon
C) Tuber
D) Bulb
How does a phylogenetic tree indicate major evolutionary events within a lineage?
"you are exercising doing aerobics or a stair climber at your fitness center. as you increase to a high intensity of exercise, you would expect the tidal volume to ______________ and the frequency of respiration to _____________."
The release of __________ encourages sustentocytes to release __________. the release of __________ encourages sustentocytes to release __________. inhibin; testosterone luteinizing hormone; testosterone luteinizing hormone; androgen-binding protein follicle-stimulating hormone; androgen-binding protein
Gil's mother calls to make an appointment for her son. she reports that he has had an elevated temperature for 24 hours, ranging from 99° to 102.8° f. mrs. harris is describing which type of fever?
Final answer:
Gil's fever with temperatures fluctuating between 99° and 102.8° F suggests an intermittent fever, likely caused by a viral or bacterial infection, and while fevers can be beneficial in fighting infection, high fevers may require medical attention.
Explanation:
The fever described by Mrs. Harris for her son Gil, with a temperature range from 99° to 102.8° F (37.2° to 39.3° C), is likely intermittent. This type of fever is characterized by elevated temperatures that vary throughout the day but return to normal or subnormal levels at least once in 24 hours. The possible cause of Gil's fever could be a viral or bacterial infection, as fevers result from the body's immune response to these pathogens, leading to an upward adjustment of the body's temperature set point. It is also important to recognize that fever can play a beneficial role in fighting infections by inhibiting the growth of pathogens and speeding up cellular repair processes. However, if a fever becomes dangerously high, medical intervention may be necessary to prevent complications.