MBBS Physiology 3

Question 1

What is the normal central venous pressure (CVP) range?

Accepted Answer

2–6 mmHg

Answer

0–2 mmHg

Answer

8–12 mmHg

Answer

15–20 mmHg

Question 2

Which neurotransmitter is released at the neuromuscular junction?

Accepted Answer

Acetylcholine

Answer

Norepinephrine

Answer

Dopamine

Answer

Serotonin

Question 3

The Hering-Breuer reflex is mediated by which receptors?

Accepted Answer

Pulmonary stretch receptors (slowly adapting)

Answer

Central chemoreceptors

Answer

J-receptors

Answer

Peripheral chemoreceptors in the carotid body

Question 4

Which ion is primarily responsible for the pacemaker potential (funny current) in the SA node?

Accepted Answer

Na+

Answer

K+

Answer

Ca2+

Answer

Cl-

Question 5

Which vitamin deficiency leads to impaired collagen synthesis and is associated with scurvy?

Accepted Answer

Vitamin C

Answer

Vitamin A

Answer

Vitamin D

Answer

Vitamin K

Question 6

What is the effect of increased plasma protein concentration on plasma oncotic pressure?

Accepted Answer

Increases oncotic pressure, drawing fluid into capillaries

Answer

Decreases oncotic pressure, promoting edema

Answer

Has no effect on fluid balance

Answer

Increases hydrostatic pressure