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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.

All Topics  5254

Starling’s law of the heard________________?
A Does not operate in the failing heart
B Does not operate during exercise
C Explains the increase in cardiac output that occurs when venous return is increased
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
All the heart valves are open during which stage of cardiac cycle __________________?
A Systolic ejection
B Isovolumetric relaxation
C Isovolumetric contraction
D None of the above
Correct Answer: None of the above
Cardiac output is not affected by __________________?
A Heart rate
B Peripheral resistance
C Systolic blood pressure
D Venous return
Correct Answer: Systolic blood pressure
Stroke output of each ventricle in normal adult is_____________?
A 30 ml
B 130 ml
C 70 ml
D 5 liters
Correct Answer: 70 ml
Normally, the rate of the heart beat in a human is determined by _________________?
A The bundle of His
B All cardiac muscle
C The sinoatrial node
D The cervical ganglion
Correct Answer: The sinoatrial node
The first heart sound is produced by the_____________?
A Closure of the aortic and pulmonary valves
B Opening of the aortic and pulmonary valves
C Closure of the mitral and tricuspid valves
D Opening of the mitral and tricuspid valves
Correct Answer: Closure of the mitral and tricuspid valves
Which of the following agents in not likely to be found in plasma ?
A Thrombin
B Fibrinogen
C Prothrombin
D Calcium ion
Correct Answer: Thrombin
Hemoglobin has______________?
A Four polypeptide chains, 2α, 1β,1Υ chain
B Four heme molecules and four polypeptide chains
C Four heme molecules, 2α and 2β chains
D One heme and one globin molecule
Correct Answer: One heme and one globin molecule
Life cycle of RBC is_______________?
A 12 days
B 90 days
C 120 days
D One month
Correct Answer: 120 days
IN acute infection which of the following is found_______________?
A Leucopenia
B Leukocytosis
C Neutrophilia
D Neutropenia
Correct Answer: Neutrophilia
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