MCQ Snacks - (Free Trial) - Physiology

10 Questions | By Mcqsnacks | Updated: Mar 22, 2022 | Attempts: 134

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1.

ln isometric exercise all are increased except :
- A.
  
  Heart rate
- B.
  
  Cardiac output
- C.
  
  Mean arterial pressure
- D.
  
  Systemic vascular resistance
2.

Aldosterone receptors are present in all except
- A.
  
  Liver
- B.
  
  Colon
- C.
  
  Hippocampus
- D.
  
  Distal nephron
3.

Pulmonary circulation differs from systemic circulation
- A.
  
  Pulmonary vasodilation in hypoxia
- B.
  
  Pulmonary vasoconstriction in hypoxia
- C.
  
  Decreased blood volume during systole
- D.
  
  Increased basal vasoconstrictor tone
4.

Increase in threshold level of a nerve on application of a slowly rising sub-threshold stimulus is known as:
- A.
  
  Adaptation
- B.
  
  Accomodation
- C.
  
  Refractoriness
- D.
  
  Electrotonus
5.

Which of the following is true about fourth heart sound ‘S4‘ :
- A.
  
  Can be heard by the unaided ear
- B.
  
  Frequency is greater than 20 Hz
- C.
  
  Heard during ventricular filling phase
- D.
  
  Heard during ventricular ejection phase
6.

Broca’s area is concerned with:
- A.
  
  Word formation
- B.
  
  Comprehension
- C.
  
  Repetition
- D.
  
  Reading
7.

All of the following statements are true for ‘Intestinal Motility’ except:
- A.
  
  Does not depend on Gastric motility
- B.
  
  Increased by Distension
- C.
  
  Increased by Acetylcholine
- D.
  
  Increased by cholecystokinin
8.

Which of the following hormone is not secreted by the kidney:
- A.
  
  Renin
- B.
  
  Angiotensin I
- C.
  
  Erythropoietin
- D.
  
  1, 25 Dihydroxycholecalciferol
9.

When a muscle cell is relaxed and intracellular ATP levels are normal, a crossbridge will remain in which of the following states?
- A.
  
  Bound to actin and in the low-energy form
- B.
  
  Bound to actin and in the high-energy form
- C.
  
  In the high-energy form, with ADP and Pi bound to it
- D.
  
  In the high-energy form, with ATP bound to it
10.

Which of the following is true for the excitation-contraction coupling of all muscle types (skeletal, cardiac, and smooth)?
- A.
  
  An action potential causes calcium levels in the cytosol to increase
- B.
  
  Calcium binds to troponin
- C.
  
  Thick and thin filaments slide past each other
- D.
  
  A & c