CARDIOVASCULAR SYSTEM MCQ – Exercise 56

The multiple choice questions in this online test paper focuses on CARDIOVASCULAR SYSTEM MCQ. If you are looking for self evaluation of your PG Medical entrance exam preparation then this online CARDIOVASCULAR SYSTEM MCQ Test Paper will help you to evaluate your exam preparation.

Instruction for REPRODUCTIVE BIOLOGY/ REPRODUCTIVE MEDICINE / INFERTILITY MCQs:

1- This online MCQ practice test paper contains 30 questions.
2- Each question in this online practice test paper have four options and only 1 option is correct.
3- You can view the answers of this practice test paper after submitting the practice test paper.
Note: The answers mentioned at the end of practice test are the best suitable option as per our knowledge. Users shall cross-check the answers with their textbooks.

Q 1. which of the following statements about blood supply of right bundle branch is true

supplied by septal perforators of LAD

supplied by septal perforators of RCA

supplied by septal perforators of left circumflex artery

none of the above

Q 2. which of the following is an endogenous catecholamine

norepinephrine

epinephrine

dopamine

all of the above

Q 3. whcih of the following is considered as a hypertension related gene

Alpha –adducin gene

MDR1 gene

NAT2 gene

all of the above

Q 4. which of the following is a rennin secreting tumor

germinoma

benign hemangiopericytoma

choriocarcinoma

osteoblastoma

Q 5. which of the following gene is possibly related to hypertension

gene encoding AT1 receptor

gene encoding aldosterone synthetase

gene encoding β2 adrenoceptor

all of the above

Q 6. which of the following statement is false

angiotensin I is an active decapeptide

angiotensin I is an active octapeptide

ACE kininase II is located in pulmonary circulation

ACE kininase II activates bradykinin

Q 7. which of the following statements about blood supply of AV node is true

supplied by RCA in 50% of people and by left circumflex artery in 50%

supplied by RCA in 60% of people and by left circumflex artery in 40%

supplied by RCA in 75% of people and by left circumflex artery in 25%

supplied by RCA in 90% of people and by left circumflex artery in 10%

Q 8. activation of which of the following receptors by epinephrine relaxes vascular smooth muscle leading to vasodilation

α1

α2

β1

β2

Q 9. which of the following statements about age related increase of blood pressure is false

augmented by high NaCl intake

augmented by low dietary intake of calcium

augmented by low dietary intake of potassium

none of the above

Q 10. angiotensinogen, rennin and angiotensin II are also synthesized locally in

uterus

brain

spleen

all of the above

Q 11. which of the following is not a primary stimulus for rennin secretion

decreased NaCl transport in thick ascending limb of loop of henle

increased NaCl transport in thick ascending limb of loop of henle

decreased pressure or stretch within renal afferent arteriole

sympathetic nervous system stimulation of rennin secreting cells via β1adrenoceptors

Q 12. the activities of the adrenergic receptors are mediated by

receptor tyrosine kinase

cytokine receptor linked kinase

guanosine nucleotide binding regulatory proteins

serine kinase

Q 13. which of the following statements about genesis of hypertension is false

vascular volume is a primary determinant of arterial pressure over the long term

nonchloride salts of sodium have little or no effect on blood pressure

salt wasting disorders are associated with low blood pressure levels

none of the above

Q 14. which of the following directly inhibits rennin secretion

angiotensin I

angiotensin II

prorenin

all of the above

Q 15. which of the following is false about renin

prorenin is an enzymetically inactive precursor

synthesized in renal afferent renal arteriole

plasma contains 2-5 times more prorenin than renin

none of the above

Q 16. which of the following statement is false about angiotensin II

acts on angiotensin II type 1 receptors on cell membrane

potent pressor substance

stimulates secretion of aldosterone

none of the above

Q 17. according to JNC 7 stage 2 hypertension is

120/80 mm Hg

140-159/90-99 mmHg

≥160/100 mmHg

180/110 mmHg

Q 18. the probability that a middle aged or elderly individual will develop hypertension in his or her lifetime is

10%

30%

60%

90%

Q 19. which of the following is the primary trophic factor regulating synthesis & secretion of aldosterone by zona glomerulosa of adrenal cortex

potassium

ACTH

angiotensin II

all of the above

Q 20. the autonomic nervous system maintains cardiovascular homeostasis via which of the following signals

pressure signals

volume signals

chemoreceptor signals

all of the above

Q 21. isolated systolic hypertension is defined as systolic pressure of ≥140 mmHg and a diastolic pressure below

70 mm Hg

80 mm Hg

90 mm Hg

100 mm Hg

Q 22. in the kidney activation of which of the following increases tubular reabsorption of sodium

α1 adrenergic receptors

α2adrenergic receptors

β1 adrenergic receptors

β2 adrenergic receptors

Q 23. when activated by catecholamines which of the following receptors act as negative feedback controllers , inhibiting further norepinephrine release

α1

α2

β1

β2

Q 24. which of the following statements about blood supply of bundle of His is true

supplied by atrioventricular nodal branch of LAD

supplied by atrioventricular nodal branch of RCA +septal perforators of LAD

supplied by atrioventricular nodal branch of left circumflex artery + septal perforators of LAD

supplied by septal branch of left circumflexartery

Q 25. High BP before age 55 years occurs how many times more frequently among persons with a positive family history of hypertension

1.8 times

2.8 times

3.8 times

4.8 times

Q 26. which of the following is a functional effect of angiotensin II type receptor (AT2)

vasodilation

sodium excretion

inhibition of cell growth & matrix formation

all of the above

Q 27. among adults diastolic blood pressure increases progressively until what age after which it tends to decrease

~ 45 years

~ 55 years

~ 65 years

~ 75 years

Q 28. which of the following is an ECG predictor of myocardial reperfusion following thrombosis

T-wave inversion in <4 hours after MI

ST-segment resolution during first 90 minutes

AIVR

all of the above

Q 29. angiotensin II in tissues may be formed by the enzymatic activity of

tonin

chymase

cathepsin

all of the above

Q 30. renin producing carcinomas may be found in

lung

liver

pancreas

all of the above

CARDIOVASCULAR SYSTEM MCQ – Exercise 56

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