M C Q s D r i v e

Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

Absolute period when whole heart is in diastole is______________?
A 0.7 seconds
B 0.3 seconds
C 0.7 seconds
D 0.4 seconds
Correct Answer: 0.4 seconds
Cardiac cycle duration in man is_______________?
A 0.4 seconds
B 0.8 seconds
C 1.2 seconds
D 1.6 seconds
Correct Answer: 0.8 seconds
Coronary blood flow is usually predominantly controlled by_____________?
A Auto regulation
B Hormones
C Parasympathetic impulses
D Sympathetic impulse
Correct Answer: Auto regulation
Fastest conducting tissue in human heart _________________?
A AV node
B SA node
C Bundle of His
D Purkinje fibers
Correct Answer: Purkinje fibers
Closure of aortic valve occurs before the following event_______________?
A Isovolumetric contraction
B Isovolumetric relaxation
C Pre-diastole
D Pre-systole
Correct Answer: Isovolumetric relaxation
Cardiac index is related to ______________?
A cardiac output and body weight
B Cardiac output and body surface area
C Cardiac output and work of the heart
D Stroke volume and pulse rate
Correct Answer: Cardiac output and body surface area
Stimulation of barorceptor leads to ________________?
A Increased blood pressure, increased heart rate
B Decreased B.P , decreased heart rate
C Increased B.P, decreased heart rate
D Decreased B.P, increased heart rate
Correct Answer: Decreased B.P , decreased heart rate
Consider the following statements________________?
A Starling’s law of heart states that increase in force of contraction is directly related to cardiac ouput
B Staling’s law of heart states that the force of ventricular contraction is directly related to the end diastolic volume
C Both A and B
D None of the above
Correct Answer: Both A and B
Minimum blood pressure is in_____________?
A Aorta
B Arteries
C Capillaries
D Venules
Correct Answer: Venules
The largest function of the total peripheral resistance is due to _________________?
A Venules
B Arterioles
C Capillaries
D Precapillary sphincters
Correct Answer: Arterioles