Physiology Mcqs

Practice MCQs under Physiology Mcqs. 522 available Open paginated MCQ list →

1Cardiovascular system
2Central Nervous System
3Endocrinology
4Git and Liver
5Hematology
6Miscellaneous Physiology Mcqs
7Muscles and Neuromusclar Junction
8Renal System
9Respiratory System

Questions

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1.Which structure primarily controls the normal heart rate in humans?

The His bundleThe entire cardiac muscleThe sinoatrial (SA) nodeThe cervical ganglion

2.What causes the first heart sound during the cardiac cycle?

Shutting of the aortic and pulmonary semilunar valvesThe aortic and pulmonary valves openingClosing of the mitral and tricuspid atrioventricular valvesOpening of the mitral and tricuspid valves

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