Set of flashcards Physio Final Exam (Page 11 of 12)

Flashcards	451
Students	36
Language	English
Category	Medical
Level	University
Created / Updated	23.11.2016 / 25.08.2019
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52. most important factor for an Isometric contraction is:

A. ensuring the muscle does not change in length

53. At which point along the isotonic force-velocity curve is output of the greatest?

A. at the lowest force and highest velocity (Vmax)

B. at the highest force and lowest velocity (Fmax)

C. at a force that is about 1/3 of Fmax

D. at a velocity that is about 2/3 of Vmax

54. Prolonged exposure to conditions of heat causes human thirst, which receptors primarily cause its development?

A. osmoreceptors of the hypothalamus

B. chemoreceptors of the hypothalamus

C. liver osmoreceptors

D. glucoreceptors of the hypothalamus

D. baroreceptors of the aortic arch

gastrin stimulates

A. secretion of bicarbonate in the small intestine

B. gallbladder contraction

C. secretion of HCL in the stomach

D. absorption of fatty acids

Parietal cells of the stomach secretes

A. gastrin

B. cholecystokinin (CCK)

C. secretin

D. hydrochloric acid

An esophageal peristaltic way is stimulated by

A.presence of chyme in the stomache

B.presence of bulbus in the esophagus and swallowing

C.presence of chyme in the small interstine

D.presence of bulbus in the mouth

Chief cells in the stomach secretes:

A. pepsinogen

B. hydrochloric acid

C. trypsinogen

D. Trypsin

3) glucocarticoids secretion stimulated by

a. potatsium and blood concentration

b. sodium and blood conc.

c. ACTH

d. System reonin-angiotensin

1) androgen secretion stimulated by

a. ACTH

b. LH and FSH

c. System reonin-angiotensin

d. TSH

1) function of aldosterol in kidney

Answer: Increased renal tubular, reabsorbtion of sodium and increase secretion of potatsium

2) function of glucocarticoids

Answer: elevate blood glucose concentration, increase liver and plasma, increased concentration of free fatty acid in the plasma.

1) incorrect statement:

a) glucagon causes glycogenolysis and glyconeogenesis in liver

b) glucagon is a lipogenetic hormone

c) glucagon increases blood sugar concentration

d) glucagon increases amino acid uptake by liver and their conversion to glucose

1) factors influencing insulin secretion

a. increased blood glucose, fasting, growth hormone

b. increased blood glucose, somatoatatin, cortisol

c. increased blood glucose, increased blood amino acids, growth hormone

d. increased blood glucose, somatostatin, fasting

1) insulin

a) increases plasma amino acid

b) decreases uptake of amino acid into cell

c) causes protein depletion

d) promotes protein synthesis and storage

1) to promote growth insulin interact synergistically with:

a. somatostatin

b. cortisol

c. prolactine

d. growth hormone

1) growth hormone secretion inhibited by

a. hypoglacemia

b. somatostatin

c. protein deficiency

d. somatomedins

1) growth hormone

a. inhibits protein deposition in tissues, increases glucose utilization

b. decreases fat utilization for energy, increases catabolism of protein

c. promotes protein deposition in tissues, stimulates cartilage and bone growth

d. decrease mobilization af fatty acid from adipose tissue

2. Glucocorticoids

A. Elevates blood glucose concentration, decrease liver and plasma proteins, decrease concentration of free fatty acids in the plasma

B. Elevates blood glucose concentration, increase liver and plasma proteins, decrease concentration of free fatty acids in the plasma

C. Elevates blood glucose concentration, decrease liver and plasma proteins, increase concentration of free fatty acids in the plasma

D. Elevates blood glucose concentration, increase liver and plasma proteins, increase concentration of free fatty acids in the plasma

6. Which of the following pairs of hormones and the corresponding action is incorrect?

A. Glucagon – increased glycogenolysis in liver

B. Glucagon – increased glycogenolysis in skeletal muscle

C. Glucagon – increased gluconeogenesis

D. Cortisol – increased gluconeogenesis

4. Which of the following is most likely to produce the greatest increase in glucagon secretion?

A. Amino acids

B. Amino acids and glucose

C. Amino acids and somatostatin

D. Glucose and somatostatin

Menstruationation ends when the endometrium and epithelium begin its regrow and reline the surface of the uterus. What stimulates the regrowth of the cells of the epithelium?

A. Estrogen

B. Progresteron

C. LH

D. FSH

Spermatogenesisisregulatedbyanegativefeedbackcontrolsysteminwhich FSH stimulates the steps in sperm cell termination. What is the negative feedback signal associated with sperm cell production that inhibits pituitary termination of FSH?

A. Testosterone

B. Inhibin

C. Estrogen

D. LH

7. Choose correct statement: Insulin

A. Increases plasma amino acids

B. Decreases the uptake of amino acids into cells

C. Causes protein depletion

D. Promotes protein syntheses and storage

1) inhibin

a. inhibites LH and FSH secretion only in men

b. inhibites LH and FSH secretion only in women

c. inhibites LH and FSH secretion both in men and women

d. does not influence on LH and FSH secretion

1) in women estrogen is responsible for

a. secretory phase of the menstrual cycle

b. follicular phase of the menstrual cycle

c. desquemention

d. ovulation

1) increase in blood concentration of thyroid hormone (T3 & T4) inhibits secretion of:

a. ACTH

b. FSH

c. LH

d. TSH

3) secretion of catecholamines....what is incorrect?

a. hypoglycemia

b. hyperglycemia

c. starvation, shock

d. fear, pain

1) thyroid hormone (T3, T4)

a. increase: uptake of glucose by the cells, glycolysis, gluconeogenesis

b. decreases: uptake of glucose by the cells, glycolysis, gluconeogenesis

c. increase uptake by glucose by the cells and decreases glycolysis and gluconeogenesis

d. decrease uptake by glucose by the cells and increase glycolysis and gluconeogenesis

1) TSH stimulates

a) thyroid gland to secrete thyroid hormone

b) adrenal gland to secrete glycocorticoids

c) ovaries to secrete estrogen

d) anterior pituitary to secrete thyroid hormones

1) ADH (vasopressin) and oxytocin synthesized by

a. Posterior pituitary gland

b. Hypothalamus

c. Anterior pituitary gland

d. Pineal gland

1) in presence of ADH

a) collecting ducts and tubules in the kidneys are impermeable to water

b) ability of collecting ducts and tubules in kidneys to water increase

c) reabsorption of water from collecting ducts and tubules in kidney is inhibited

d) extreme loss of water to urine

7. Which of the following stimulates the secretion of parathyroid hormone (PTH)?

a. Calcitonin

b. PTH-releasing hormone from the hypothalamus

c. Respiratory acidosis

D. Decrease in extracellular calcium ion activity.

1. Calmodulin is most closely related, both structurally and functionally, to which of the following proteins?

A. G-actin.

B. Troponin C.

C. Troponin I.

D. Tropomyosin.

1.Smooth muscle that exhibits rhythmical contraction in the absence of external stimuli

also necessarily exhibits which of the following?

A. Intrinsic pacemaker wave activity.

B. Higher resting cytosolic Ca++ concentration.

C. Hyperpolarized membrane potential.

D. Actionpotentialswith“plateaus”.

1. Tetenic contraction of skeletal muscle fibers results from accumulative increase in the intraceullular contraction of which of the following?

A. Ca++.

B. Na++.

C. K+.

D. Troponin.

1. Which of the following decreases in length during the contraction of a skeletal muscle fiber?

A. Thin filaments.

B. Thick filaments.

C. I-band of the sacromere.

D. A-band of the sacromere.

1. A cross-sectional view of a skeletal muscle fiber through the H zone would the presence of what?

A. Actin but no myosin.

B. Actin and myosin.

C. Myosin but no actin.

D. Actin,myosin,and titin.

1. In normal, healthy muscle, what occurs as a result of propagation of an action potential to the terminal membrane of a motor neuron?

A. Depolarization of the T tubule membranes follows.

B. Always results in muscle contraction.

C. Increase in intracellular Ca++ concentration in the motor neuron terminal.

D. All of the above are correct.

1. In what way does visceral smooth muscle differ from skeletal muscle?

A. Visceral smooth muscle can contract in response to stretch.

B. Visceral smooth muscle is capable of generating only about half the maximal force of contraction

C. Contraction of visceral smooth muscle is ATP dependent.

D. The rate of cross-bridge cycling in visceral smooth muscle is approximately 100 times faster than that in skeletal muscle.

1. Which of the following statements about smooth muscle contraction is most accurate?

A. It requires more energy than skeletal muscle contraction.

B. It can occur without the generation of an action potential.

C. It is shorter in duration than skeletal muscle.

D. It is Ca++ independent.

Physio Final Exam

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