Top 550+ Solved Physiology MCQ Questions Answer

From 31 to 45 of 687

Q. Which of the following tissues possess FEW thyroid hormone receptors?

a. liver

b. testis

c. kidney

d. heart

e. skeletal muscle

  • b. testis

Q. Where are the receptors located by which thyroid hormones mediate most of theireffects?

a. cell membrane

b. outer mitochondrial membrane

c. nuclear chromatin

d. inner mitochondrial membrane

e. cytoplasm

  • c. nuclear chromatin

Q. Regarding the action of insulin in skeletal muscle, which of the following isINCORRECT?

a. it decreases protein catabolism

b. it induces glucogen synthase

c. it decreases ketone uptake

d. it increases amino acid uptake

e. it decreases the release of gluconeogenic amino acids

  • c. it decreases ketone uptake

Q. Which thyroid hormone possesses the GREATEST biological activity?

a. T4

b. DIT

c. MIT

d. T3

e. RT3

  • d. T3

Q. Regarding the effects of thyroid hormones, which of the following does NOT occur?

a. it increases metabolic rate

b. it directly stimulates sodium-potassium ATPase

c. it increases protein and fat catabolism

d. it increases body temperature

e. it increases cerebral oxygen consumption

  • e. it increases cerebral oxygen consumption

Q. Regarding the action of insulin on the liver, which of the following is INCORRECT?

a. it increases gluconeogenesis

b. it decreases glycogenolysis

c. it increases synthesis of triglyceride and VLDL

d. it decreases cyclic AMP

e. it increases phosphate uptake

  • a. it increases gluconeogenesis

Q. Which statement regarding the thyroid gland and its hormones is INCORRECT?

a. thyroid hyperactivity is associated with an increase in plasma catecholamines

b. iodide trapping by thyroid cells is an active process

c. thyroid hormones enter cells by diffusion across the cell membrane

d. thyroid hormones cause an increase in 2,3 - DPG

e. thyroid hormones increase growth hormone secretion

  • a. thyroid hyperactivity is associated with an increase in plasma catecholamines

Q. Regarding the secretion of insulin, which statement is INCORRECT?

a. insulin is not required for glucose to enter pancreatic B cells

b. it involves closure of ATP-sensitive potassium channels

c. it is a biphasic process involving two pools of insulin

d. it involves opening of voltage-sensitive calcium channels

e. glucose enters pancreatic B cells by combining with glut 4

  • e. glucose enters pancreatic B cells by combining with glut 4

Q. Which of the following do NOT increase TSH secretion?

a. TRH

b. glucocorticoids

c. infants exposed to cold temperature

d. acute psychosis

e. night time

  • b. glucocorticoids

Q. Which of the following does NOT inhibit insulin secretion?

a. somatostatin

b. atropine

c. propranolol

d. gastrin

e. phenytoin

  • d. gastrin

Q. Which of the following does NOT increase intestinal calcium absorption?

a. hypocalcaemia

b. parathyroid hormone (PTH)

c. glucocorticoids

d. hypervitaminosis D

e. protein in diet

  • c. glucocorticoids

Q. Which of the following does NOT stimulate insulin secretion?

a. acetoacetate

b. glucagon

c. hypokalaemia

d. acetylcholine

e. theophylline

  • c. hypokalaemia

Q. Which of the following does NOT decrease intestinal calcium absorption?

a. hypercalcaemia

b. decreased PTH

c. hypovitaminosis D

d. growth hormone

e. phytic acid and oxalate in intestine

  • d. growth hormone
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