Follicles that undergo the process of ____________ degenerate.

Final answer:

Muscles are indeed stronger during eccentric contractions than concentric contractions, with the former occurring when a muscle lengthens under force and the latter when it shortens.

Explanation:

The statement 'Muscles are stronger eccentrically than concentrically' is true. An eccentric contraction occurs when the muscle lengthens while producing force, often acting as a braking force to protect joints. The muscle is resisting a force greater than the force it is producing, and this type of contraction is more powerful than when the muscle shortens, as in a concentric contraction.

For example, when you lower a hand weight, your biceps perform an eccentric contraction. During eccentric contractions, muscles can absorb and control more force than during concentric contractions, where the muscles shorten to move a load, like lifting the weight upwards. This difference in strength during these types of contractions is utilized in various exercises and movements that require control, balance, and resistance to opposing forces. Hence, the correct answer is a. true.

Answer:

The correct answer is D.

Explanation:

Papillary muscles, attached via chordae tendineae, help to close the valves and prevent regurgitation.

Pectinate muscles are parallel ridges in the walls of the atrium of the heart, mainly in right atrium. They can stretch during adverse loading conditions, to help the right atrium to dilate without much wall stress.

The mismatched pair is D. pectinate muscles - muscles that close valves. Pectinate muscles are actually located in the atria of the heart and they don't perform the role of closing heart valves.

The mismatched pair in the options you've provided are D. pectinate muscles - muscles that close valves. Pectinate muscles are actually found in the atria of the heart. They do not close valves, rather they help in the contraction of the atria emptying the heart chambers during a cardiac cycle. Option D is incorrect because pectinate muscles have no role in closing the heart valves which is actually performed by papillary muscles.

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Answer:

Tt and tt

Explanation:

Dominant alleles are written with capital letters.

Recessive alleles are written with lowercase letters.

When an allele is dominant, the individual only needs one copy of it in order for the trait it codes to be expressed.

When an allele is recessive, the individual needs to have two copies of it in order for the trait it codes to be expressed.

Given the gene T/t, which determines the ability to taste PTC, there are 3 possible genotypes for a person:

The cross between a heterozygous taster with a non-taster would be:

Answer:

The correct answer is option C. abutment teeth.

Explanation:

Abutment teeth are a term that is used for teeth that are present or anchored on either side of the teeth that can be attached or removable prosthetic denture or teeth bridges.

Bridges function as a framework and can be made up of metal such as gold or porcelain that is attached to the backs of abutment teeth. In simple words, an abutment is a site in the mouth that is used to anchor a fake tooth.

Thus, the correct answer is option C. abutment teeth.

Answer:a. They are derived from a very diverse sample of subjects.

Explanation:

A is incorrect option this is because of the fact that if sample data is collected from the diverse subjects of the population. Then some some subjects may be weak and others may be strong. The data obtain will not be reliable and cannot be used for comparing the strength among individuals.

Answer:

A

Explanation:They are derived from a very diverse sample of subjects.

Explanation:

Aldosterone is steroidal hormone which is produced by outer-section of adrenal cortex in adrenal gland. It acts on distal tubules and the collecting ducts of kidney to cause conservation of the sodium by facilitating the secretion of the potassium and increased water retention.

Atrial natriuretic hormones are natriuretic peptide hormone which are secreted from cardiac atria. Main function of the hormone is causing reduction in the volume of the expanded extracellular fluid by increasing the renal sodium excretion.

Thus, Atrial natriuretic hormones causes sodium and the Water loss while Aldosterone helps in the conservation of the sodium and water retention.

Aldosterone and atrial natriuretic hormones (such as ANP) are antagonists because aldosterone promotes the reabsorption of sodium and water, increasing blood pressure, whereas ANP promotes their excretion, reducing blood pressure. ANP inhibits the release of aldosterone, renin, and ADH, ensuring balanced regulation of blood volume and pressure.

In what way are aldosterone and atrial natriuretic hormones antagonists? Aldosterone and atrial natriuretic hormones serve opposite functions in the regulation of blood volume and pressure. Aldosterone promotes the reabsorption of sodium (Na+) and water in the kidneys, an action that increases blood volume and pressure. In contrast, atrial natriuretic hormones, such as atrial natriuretic peptide (ANP), counteract this effect by promoting the excretion of Na+ and water, leading to a decrease in blood volume and pressure. ANP achieves this by inhibiting the release of aldosterone, renin, and ADH (Anti-Diuretic Hormone), effectively reducing Na+ and water reabsorption in the kidneys. This antagonistic relationship between aldosterone and ANP ensures a balanced regulation of blood pressure and volume, responding to physiological needs such as the need to lower blood pressure in conditions like heart failure.

Answer: lithotripsy

Explanation:

Kidney stones can be define as one of the urogenital disorders. There is no reason for the formation of kidney stones. Typically the adults which are over the age of 40 and males are more susceptible to the develop kidney stones.

The lithotripsy is a non-invasive technique which utilizes the shock waves so as to break the stones present in the kidneys into small pieces so that they can be easily pass through the body by urine.

Answer:

The correct answer to fill in the blank for the question: At the Holy Frijoles restaurant, you order a burrito grande with extra sour cream and cheese and an order of tortilla chips with guacamole. You´re very satisfied with your meal- it´s a lot of food- and as you finish off the last of the chips, the satiety center in your:____, starts letting you know you´ve had enought to eat now, would be: ventromedial nucleus of the Hypothalamus.

Explanation:

The center that has been known in the brain to be associated with the sensation of satiety when eating is the ventromedial nucleus of the hypothalamus. As the stomach distends with the contents in it, nerve centers there start firing towards the hypothalamic centers, where this ventromedial nuclei receives the message and produces the sensation that satiety has been reached, and fullness has been reached. It is this message that will stop the feeling of hunger from taking over and this is what has happened to the person who ate the huge burrito.

The satiety signals, indicating that you've eaten enough, are controlled by the hypothalamus in the brain. This process is influenced by an increase in blood glucose levels, gastrointestinal passage of food, and the release of leptin by fat cells.

At the Holy Frijoles restaurant, after enjoying a hearty meal, the satiety center in your hypothalamus starts signaling that you've had enough to eat. When you eat, various physiological mechanisms work in concert to regulate the feeling of fullness or satiety. The increase in blood glucose levels after eating prompts the pancreas and liver to send signals to the brain to curtail hunger. Furthermore, the passage of food through the gastrointestinal tract generates satiety signals that are detected by the brain.

Additionally, the hormone leptin, released by fat cells, plays a crucial role in signaling satiety. Overall, it is the hypothalamus region of the brain that controls the signals of hunger ("time to eat") and satiety ("time to stop eating"), with high fatty acid foods promoting a greater sense of satiety compared to foods predominantly comprised of carbohydrates.

Answer: a. lipid-soluble hormones generally have a longer half-life.

Explanation:

The hormones are the chemical substances which are produced by the glands it in the body to conduct a specialized function in the body. The biological half life of the hormone can be define as the time it takes so as to reduce half of it's functional or physiological activity.

The lipid soluble hormone does not easily solubilize in the body fluids. It is easily diffuse through the cell membrane and performs it action. It generally have a longer half life. The examples of the such hormones includes progesterone, testosterone and aldosterone.

Answer:

The structural and functional unit of the kidney is called nephron. Nephron is made up of two parts renal corpuscles and renal tubule. The function of nephron is to filter the blood to remove waste materials from it.

Renal corpuscles

Renal corpuscles are made up of glomerulus which is a tuft of capillaries originates from incoming afferent arteriole and bowman's capsule which surrounds the glomerulus. The function of renal corpuscles is to filter blood from glomerulus and pass it to the renal tubule.

Renal tubule is made up of three parts PCT(proximal convoluted tubule), loop of Henle and DCT(distal convoluted tubule).

PCT: It is the main site of reabsorption and reabsorption of most of the ions like K⁺, Na⁺, Cl⁻and HCO₃⁻, water, glucose, and other essential molecules takes place in this section. Ions like H⁺ and NH⁴⁺ is secreted in the PCT.

Henle's loop: It contains descending and ascending loop. The descending loop is impermeable to ions but permeable to water and ascending loop is impermeable to water and permeable to ions like Na⁺,k⁺, Cl⁻. It plays the main function in urine concentration.

DCT: The main function of DCT is to maintain urine pH by reabsorbing ions like Na⁺, Cl⁻,HCO₃⁻ from it and secretion of ions like H⁺, K⁺ , and NH₄⁺ in it.

Answer and explain:

Bronchial arteries are provenient of thoracic aorta. Their origin is in systemic circulation and their function is provide oxygen blood to big vessels, visceral pleura and walls and glands of bronquios. Also, bronchial arteries are encharged of humidify the air to reduce it loses by evaporation in alveolar surface.

Bronchial arteries are components of systemic circulation.  

Bronchial arteries give the nutritional circulation to the non-respiratory structures in the lungs. The left bronchial arteries are usually 2, they directly emerge from the thoracic aorta, while the right bronchial artery emerges from the third intercostal artery or from the left superior bronchial arteries. That the bronchial arteries emerge from aorta explains how they made a part of systemic circulation.

Before these arteries penetrate the lungs, they also give some branches to pericardium, lymphatic ganglia’s, esophagi and bronchioles. This circulation is characterized for having a high pressure but a low flux. The pressure that these arteries manage has no significant differences whit the aortic pressure. 

Answer:

The answer to the question: What do you view as important issues within healthcare delivery, would be: the availability of more and better resources to ensure that all patients are treated with efficiency and effectiveness, depending on their individual needs, and the possibility to have more, and better-prepared office staff, like secretaries and receptionists, so that healthcare providers can focus entirely on patient care, and not on the mountains of paperwork, phone calls and documentation that insurance companies require to authorize a simple procedure that would improve a patient´s life.

Explanation:

Although there are a lot more issues that need to be addressed regarding patient care delivery, these two have proven to become real obstacles. First, although some hospitals and clinics are blessed with resources, this is not always the case, especially for public hospitals. The result of this is that patients at public hospitals are not always given the best care that could be given to them due to lack of resources and this lowers the efficiency of healthcare. The second issue is that healthcare professionals are becoming encumbered more and more with the amount of paperwork and documentation that is demanded by insurance companies simply to authorize the payment of a procedure. This also limits the effectiveness of treatment, as healthcare professionals do not have access to all the resources that are available to ensure the best treatment. This is why, to me, these two are some of the most important issues to face right now.

Answer: b. False

Explanation:

Immunological memory is the feature or quality of the immune system of the body to immediately and recognize a foreign antigen which was previously encountered and generate the immune response against it. Generally it helps in producing the secondary, tertiary and other s immune responses for the same antigen. It is observed in helper T cells but also by the B cells.

Answer:(c)mass, Density

Explanation:

First the mass of the body is calculated using the buoyant force and then the density of the body is calculated.

[tex]F_B=mg=\rho _f\cdot v_d\cdot g[/tex]

where [tex]F_B[/tex]=buoyant force

m=mass of object

[tex]\rho _f[/tex]=density of fluid

[tex]v_d[/tex]=displaced volume

Final answer:

The statement regarding blood pressure at the union of the vena cavae and right atrium being about 80 mm Hg is false; this value is much lower and close to 0 mm Hg, while the normal systemic arterial blood pressure should be around 120/80 mm Hg.

Explanation:

The statement that in a healthy adult, blood pressure at the union of the vena cavae and right atrium is about 80 mm Hg is false. The pressure at this junction, known as the central venous pressure, is much lower than systemic arterial blood pressure and is usually close to 0 mm Hg in a healthy individual. The normal blood pressure for a healthy adult is typically stated as 120/80 mm Hg, where 120 mm Hg represents the systolic pressure and 80 mm Hg represents the diastolic pressure. The blood pressure values mentioned in the question are reminiscent of the systemic arterial pressure, not the pressure at the vena cavae and right atrium. Moreover, it is the systolic and diastolic pressures that are measured when a healthcare professional checks arterial blood pressure, not venous pressure.

Answer:

The correct answer is option C. Amalgam restoration.

Explanation:

Amalgam is the material that uses in the restoration of the teeth. For a long period of time amalgam is the first choice of dentists for restoration. Amalgam consist of the silver tin alloy reacted with the liquid mercury that results in strong silver-gray material.

Amalgam is most common as it is strong than other materials used for restoration. These are durable and cost-effective too.

Thus, the correct answer is option c. Amalgam.

Amalgam is the strongest restoration material.

The strongest restoration among the options given is Amalgam, which is a material that dentists use to fill cavities. Amalgam fillings are known for their high strength and durability. They are made up of a mixture of silver and other metals, including mercury.

Answer: Glycogen

Explanation:

Glycogen is the most efficient form of energy storage. This is because the energy is stored  in the form of glucose can be easily converted into glucose to be used by the body.

Primarily the energy is stored in the form of glycogen only. It is stored in the liver and muscle cell of the body.

The energy required to break the bond of glycogen to convert into glucose is less as compared to other macromolecules.

Hence, the correct answer is option C

Answer:

The correct answer is d) Lipids

Explanation:

Lipids are fat molecule which contains mainly triglyceride made up by the body when extra energy is consumed. Body store lipids to provide energy to the body when there is no glucose left to provide the energy so it acts as a energy reserve.

It is the most efficient form of energy storage because it can provide more calory of energy per gram than protein and carbohydrate.1 gm of lipid can yield 9 kcal while 1 gm of carbohydrate only yields 4 kcal.

So body can go long(weeks) without food due to the energy provided by stored lipids. Glycogen can only provide energy for one or two days.

Answer:

The correct answer will be- Atrial natriuretic factor (ANF).

Explanation:

The atrium of the heart plays important role in regulating the blood volume and blood pressure.  The mechanical stretching of the atria leads to the release of an important hormone called atrial natriuretic factor.

ANF acts by increasing the excretion of sodium and inhibition of renin in the kidney as well as antagonizing vasoconstriction and shifting the fluid from  intravascular to the interstitial compartment in the cardiovascular system.

Thus, Atrial natriuretic factor is the correct answer.

Answer:

The answer to fill in the blanks in the question: PCO2 is:____ in alveolar air and ____ in tissues, would be, D: 40mmHg for alveolar air and 45mmHg, for the blood that is returning from the tissues.

Explanation:

The reason for this comes from the purpose and the places that respiration takes place. Respiration has two purposes: take in oxygen from the air, and release CO2, a waste of cellular respiration processes, produced by the cells in tissues. The reason for the differences in molecules of CO2 being higher in the blood that comes from tissues, and not in the air from the alveoli is that in the alveoli, oxygen dissolves into the tissue of the alveoli and passes to the blood that is prepared to capture as many of the molecules as possible, to carry them to the cells. But in tissue blood, since oxygen has already been used in respiration, there is a high production of CO2. These molecules will dissolve in the blood and will be carried to the lungs, but this time to be released out of the body.

Final answer:

The partial pressure of carbon dioxide (PCO2) is 40 mmHg in alveolar air and 45 mmHg in tissues, which facilitates the diffusion of CO2 from blood to the alveoli for expulsion.

Explanation:

The question pertains to the partial pressures of carbon dioxide (PCO2) in different parts of the body, specifically in alveolar air compared to tissue. The correct answer is d) 40 mmHg, 45 mmHg'. Alveolar PCO2 is about 40 mmHg, which is lower than the PCO2 in the surrounding capillaries, which is about 45 mmHg. This gradient allows carbon dioxide to diffuse from the blood into the alveoli, where it is then expelled from the body during exhalation.

Answer:

b. False

Explanation:

Pre-diabetes is the clinical situation that precedes the diagnosis of type 2 diabetes. At this point, the body begins to show signs, mainly through blood tests, that sugar (blood glucose) levels are starting to get high, and insulin levels too. Pre-diabetes is well known for its state of insulin resistance, when the pancreas starts producing too much insulin in an attempt to control sugar levels. The patient who has pre-diabetes cannot be diagnosed with the disease, because being pre-diabetic does not mean being diabetic, but it does mean that there is a great chance that in the future (perhaps near) this patient will develop the metabolic disease.

Answer:

D. Pancreas

Explanation:

The pancreas is a gland that has several functions, one of the main functions is as an exocrine gland by secreting digestive enzymes, such as amylase and lipase into the GI tract when the food is passing through the duodenum, these enzymes contribute to break down fats and proteins into small portions so these can be absorbed easily by the large intestine. The second most important function of the pancreas is as an endocrine gland during insulin secretion through the islets of Langerhans. Insulin is a hormone that is released in the bloodstream during digestion and it is responsible for regulating blood sugar levels by distributing it in the different organs.

Answer:

The coreect answer is C)  release their secretions directly into body fluids.

Explanation:

Endocrine cells are found in endocrine glands which are also called ductless glands and release their secretions directly into the body fluids. The secretions are mainly hormones and they reach their target organs through blood.

The major endocrine glands are pituitary, thyroid, parathyroid, pancreas, adrenal, ovaries and testicles. Hormones released by these glands regulate the functional activity of their target cells and organs.

Some of the glands like hypothalamus and thymus contain cells which secrete hormones also comes under endocrine system but are not called endocrine gland.

Endocrine cells secrete their products, such as hormones, directly into the bloodstream or surrounding tissues, distinguishing them from exocrine glands that use ducts.

Endocrine cells release their secretions directly into body fluids without the use of ducts, which is a defining characteristic of this type of gland. In contrast, exocrine glands secrete substances through ducts to an epithelial surface or the exterior of the body. Endocrine glands are comprised of epithelial cells that have been modified for their specific secretory function, secreting hormones into the interstitial fluid and bloodstream, influencing various physiological processes. Endocrine secretions include hormones, which regulate many bodily functions and processes.

Answer:

The correct answer to the question: The contraction phase of the cardiac cycle refers to diastole, would be, B: false.

Explanation:

The cardiac cycle is defined as the process by which the heart fills up with both oxygenated and de-oxygenated blood, and pumps one towards the lungs for oxygenation and the other towards the body, to delived oxygen and other nutrients to the organs. In order to accomplish this function, the heart has two parts in its cycle, the sistole and diastole. The sistole is the part of the cycle when the heart literally squeezes its chambers, both the atria and mostly the ventricles, to pump out the blood present in them. Distole is the part of the cycle when the chambers relax, and open to their fullest extent, to permit the entrance of the necessary blood from the vessels, so that a new cycle can begin. This is why the answer would be false. Diastole is when the heart is relaxed and getting filled with blood.

Answer:

The answer to the question: Steroid hormones are usually released in large quantities into the blood, would be, B: False.

Explanation:

Essentially, hormonal activity has one purpose, to stimulate and excite the activities of target cells. Steroid hormones produced by the gonads and also the adrenal glands, also have this purpose, to induce target cells to perform a specific function. Because their purpose is excitatory, large amounts of them released into the blood could cause serious stress to the body, and in any case, the body itself has regulatory systems that, once a certain exitatory threshold has been reached, regardless of the amount of new hormones arriving at a cell, this one will not respond, because there will be no further receptors for it. Steroid hormones, thus, are released in small amounts usually, in order to maintain the target cells functioning as they should. Large amounts will NOT be USUALLY released into the bloodstream, unless there is a situation that merits this burst in them. But normally, steroid hormones are not released in large quantities into the bloodstream.

Answer:

The answer is: horizontal plate of palatine bone and palatine process of the maxilla bone.

Explanation:

The nasal cavity is the bilateral air-filled space present above the roof of the mouth and behind the nose, that forms the interior of the nose.  

The hard palate forms the roof of mouth and floor of the nasal cavity. The bones of the hard palate that are present on the floor of nasal cavity are the horizontal plate of palatine bone and palatine process of the maxilla bone.

The bones that form the floor of the nasal cavity are the palatine processes and the horizontal plates of the maxilla bone. These components of the maxilla bone shape part of the nasal cavity's floor and part of the face's structure.

The bones that form the floor of the nasal cavity are the palatine processes and the horizontal plates of the maxilla bone. The palatine processes of the maxilla make up the anterior three-quarters of the hard palate, and the horizontal plates of the palatine bones make up the posterior one-quarter.

The maxilla bone is one of the most significant facial bones, shaping not only the middle third of the facial structure but also providing the basis for the eye socket and the nasal cavity. The term 'process' in the phrase 'palatine process' refers to the protrusion of a bone. Therefore, the 'palatine process' is a part of the maxilla bone that extends to form a portion of the nasal cavity's floor.

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Answer: b. brachialis

Explanation:

The brachialis is the muscle that is present in the upper arm of the flexes of the elbow joint. It lies below biceps brachii. It forms the part of the cubital fossa. It does not cross the elbow joint. It is the prime mover of the flexion of the elbow of the hand.

Final answer:

The supinator does not cross the elbow joint; it is responsible for supination of the forearm. The brachialis, biceps brachii, and triceps brachii all cross the elbow joint and are involved in either flexion or extension of the forearm. The correct answer is a. supinator.

Explanation:

The muscle that does not cross the elbow joint is the supinator. It is solely involved in turning the forearm anteriorly, which is known as supination. The other options, brachialis, biceps brachii, and triceps brachii, all cross the elbow joint.

The brachialis and biceps brachii are responsible for flexing the forearm, while the triceps brachii is the muscle that extends the forearm. Therefore, the correct answer to the question is the supinator, as it does not participate in elbow joint movement like flexion or extension.

Answer:

The correct answer is C. 20

Explanation:

Primary dentition is also called deciduous teeth, milk teeth  or baby teeth. The primary dentition contains 20 teeth 10 on upper side 10 on lower which contains 4 molar, 2 canines and 4 incisors containing two central and two lateral incisors.

Central incisors appears between 6-12 months then lateral incisors comes between 9-16 months. First molar comes in between 13-19 months and second molar comes in 25-33 months. Canines comes between 16-22 months. These teeth are lost between 6-12 years and permanent teeth takes their place.

Explanation:

The Central nerve system malformations which causes polyhydramnios are as follows -

1 . The baby born with an underdeveloped and malformed brain and skull , Anencephaly .

2. The Malformation in the development of the spinal cord , Spina bifida .,

3. The abnormal size of the cranium and the head .

4. The accumulation of the excessive fluid in the brain cavities , Hydrocephalus .

Answer:

I would say that the answer to the question: Blood viscosity is highly variable in healthy individuals under resting conditions, would be, B: False.

Explanation:

Blood viscosity is the density present in the blood due to its charge of cells (red blood cells, white blood cells, and platelets) in relation to the amount of serum, or water, in the mix. This viscosity then, is highly dependent on hematocrit, or the count mostly of red blood cells. There are conditions that can make hematocrit counts rise severely, and make blood more viscous, like extreme temperature conditions, dehydration, or an illness, as well as blood loss. However, in general, under normal conditions, in a healthy person, under resting situations, the hematocrit tends to remain normally at 40%, and blood viscosity remains at a normal level. If hematocrit changes, rises, or falls, then viscosity will also change, but for this to happen, the person must not be meeting resting, and normal, conditions.

Answer:

TRUE

Explanation:

In the cardiovascular system, the blood flows from high pressure to low pressure.

In the ventricular ejection phase, when the muscles of the ventricles contract, the pressure gradient in ventricles rises. This increases in the pressure in the ventricles exceeds the pressure in the pulmonary artery and aorta, thus opening pulmonary and aortic valves and ejecting the blood from the heart.