Top 550+ Solved Physiology MCQ Questions Answer

a. parathyroid hormone

b. vitamin D

c. growth hormone

d. thyroxine

e. calcitonin

a. aminophylline

b. renal cell carcinoma

c. cobalt salts

d. thyroxine

e. adenosine

a. its secretion increases within minutes to hours in response to hypoxia

b. it causes pro-erythroblasts to mature more rapidly into erythrocytes

c. the spleen and salivary glands secrete, but don’t synthesise it

d. it inhibits apoptosis in erythroid stem cells

e. the adult liver is able to synthesise enough for normal erythropoiesis in the absence of both kidneys

a. it is continuously secreted by the parathyroid glands

b. it is synthesised and secreted by the oxyntic cells

c. it is rapidly cleaved in the Kupffer cells of the liver

d. it increases osteoclasts activity in bone

e. it increases formation of 1,25-dihydroxycholecalciferol

a. they can cause dose-dependent vasoconstriction in most vascular beds

b. they activate phospholipase C

c. they are structurally similar to vasoactive intestinal contractor

d. they have negative inotropic effect

e. there are low concentrations present in blood

a. it is secreted by parafollicular cells of the thyroid gland

b. it inhibits osteoclastic bone resorption

c. total thyroidectomy is usually associated with hypercalcaemia

d. it decreases renal tubular calcium and phosphate reabsorption

e. it is only secreted when plasma calcium concentration exceeds 9.5mg/100ml

a. cardiac innervation is not required for secretion to occur

b. its action is terminated by receptor-mediated endocytosis

c. its filtration fraction is decreased

d. it is secreted by heart, lung and brain

e. glucocorticoids increase its secretion

a. it increases renal tubular calcium and phosphate reabsorption

b. it causes an increase in synthesis of calcium-binding protein

c. it increases bone resorption

d. it decreases bone formation

e. it increases intestinal calcium and phosphate absorption

a. aldosterone

b. cyclic GMP

c. renin

d. vasopressin

e. angiotensin III

a. constriction of the IVC in the thorax

b. ACTH

c. surgery

d. hyperkalaemia

e. lying supine from the standing position

a. it responds to changes in plasma sodium more strongly than changes in plasma potassium

b. it is only synthesised in the zona glomerulosa of the adrenal cortex

c. its main action is to increase the synthesis of sodium-potassium pumps

d. angiotensins II and III have about equal mineralocorticoid stimulating activity

e. it acts via a cytoplasmic receptor that has equal affinity for cortisol

a. niacin

b. B6

c. K

d. pantothenic acid

e. biotin

a. aproprotein E and aproprotein A

b. cholesterol 30%, protein 20%, triglyceride 50%

c. lethicin 10%, cholesterol 25%, triglyceride 65%

d. protein 2%, cholesterol 5%, triglyceride 90%

e. the enzyme protein phospholipase

a. the adult human body contains 15% of its body mass as calcium

b. calcium is passively absorbed from the intestinal brush border

c. oestrogen inhibits osteoclasts

d. TNF inhibits osteoclasts

e. corticosteroids stimulate osteoblasts

a. peroxisomes are larger than lysosomes

b. pH of lysosomes is higher than the rest of the cytoplasm

c. microfilaments are hollow

d. myosin 1 molecules are characteristically found in muscle cells

e. microfilaments are made up of actin