Physiology MCQs

Option A: Volume of the circulation per minute

Option B: Peripheral vascular resistance

Option C: Pulse Pressure

Option D: Total Capacity

Correct Answer: Volume of the circulation per minute ✔

Option A: 1 to 4 m/sec

Option B: 5 to 8 m/sec

Option C: 9 to 12 m/sec

Option D: More than 12 m/sec

Correct Answer: 1 to 4 m/sec ✔

Option A: Reynolds number < 2000

Option B: Decrease in velocity of blood

Option C: Decrease in density of blood

Option D: Increase in diameter of blood vessel

Correct Answer: Increase in diameter of blood vessel ✔

Option A: Higher filtration pressure

Option B: Lower filtration pressure

Option C: Both of the above

Option D: None

Correct Answer: Higher filtration pressure ✔

Option A: The loudest sound is the diastolic pressure

Option B: Systolic pressure estimation tends to be lower than those make by palpatory method

Option C: The first sound heard is the systolic pressure

Option D: The sounds that are heard are generated in heart

Correct Answer: The first sound heard is the systolic pressure ✔

Option A: Preload

Option B: After load

Option C: Heart rate

Option D: Myocardial contractility

Correct Answer: After load ✔

Option A: is capable of generating impulses

Option B: Has rich sympathetic innervation

Option C: Has poor cholinergic innervation

Option D: Generates impulses at the highest rate

Correct Answer: Generates impulses at the highest rate ✔

Option A: Reflex hyperpnea

Option B: Reflex Hypercapnia

Option C: Reflex tachycardia

Option D: Reflex Hypercapnia

Correct Answer: Reflex Hypercapnia ✔

Option A: Increases heart rate

Option B: Decreases myocardial irritability

Option C: Increases force of contraction

Option D: Increases oxygen uptake by heart

Correct Answer: Decreases myocardial irritability ✔

Option A: Isotonic relaxation

Option B: Isovolumetric relaxation

Option C: Isovolumetric contraction

Option D: Isotonic contraction

Correct Answer: Isovolumetric contraction ✔

Option A: Cardiac efficiency

Option B: Cardiac index

Option C: Mean stroke volume

Option D: Mean arterial pressure

Correct Answer: Mean stroke volume ✔

Option A: 2.5

Option B: 4.25

Option C: 5.25

Option D: 9.5

Correct Answer: 5.25 ✔

Option A: AV node

Option B: SA node

Option C: SA node

Option D: Purkinje fibers

Correct Answer: AV node ✔

Option A: Lasts till cardiac contraction

Option B: Longer than refractory period in skeletal muscle

Option C: A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus

Option D: Corresponds with duration of action potential

Correct Answer: All of the above ✔

Option A: Hyperplasia

Option B: Hypertrophy

Option C: Fatty infiltration

Option D: Increased amounts of fibrous connective tissue

Correct Answer: Hypertrophy ✔

Option A: Aorta

Option B: Artery

Option C: Arteriole

Option D: Vein

Correct Answer: Arteriole ✔

Option A: Does not operate in the failing heart

Option B: Does not operate during exercise

Option C: Explains the increase in cardiac output that occurs when venous return is increased

Option D: Explains the increase in cardiac output when the sympathetic nerves supplying the heart stimulated

Correct Answer: Explains the increase in cardiac output that occurs when venous return is increased ✔

Option A: Systolic ejection

Option B: Isovolumetric relaxation

Option C: Isovolumetric contraction

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Heart rate

Option B: Peripheral resistance

Option C: Systolic blood pressure

Option D: Venous return

Correct Answer: Systolic blood pressure ✔

Option A: 30 ml

Option B: 130 ml

Option C: 70 ml

Option D: 5 liters

Correct Answer: 70 ml ✔

Option A: The bundle of His

Option B: All cardiac muscle

Option C: The sinoatrial node

Option D: The cervical ganglion

Correct Answer: The sinoatrial node ✔

Option A: Closure of the aortic and pulmonary valves

Option B: Opening of the aortic and pulmonary valves

Option C: Closure of the mitral and tricuspid valves

Option D: Opening of the mitral and tricuspid valves

Correct Answer: Closure of the mitral and tricuspid valves ✔