medical MCQs – Page 367

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

7321. What is common between systemic and pulmonary circulation is_____________?
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A. Volume of the circulation per minute

B. Total Capacity

C. Peripheral vascular resistance

D. Pulse Pressure

7322. Fastest conducting tissue in human heart _________________?
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A. Purkinje fibers

B. AV node

C. Bundle of His

D. SA node

7323. Cardiac output is a measure of______________?
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A. Blood pressure X cardiac rate

B. Peripheral resistance X tissue fluid

C. Peripheral resistance X cardiac rate

D. Heart rate X blood volume
7324. Abdominal visceral pain is transmitted by ________________?
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A. fibers

B. Sympathetic fibers

C. fibers

D. Parasympathetic fibers

7325. Respiratory center is situated in_______________?
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A. Hypothalamus

B. Medulla oblongata

C. Midbrain

D. Spinal cord

7326. In determining blood pressure by auscultatory method_____________?
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A. Systolic pressure estimation tends to be lower than those make by palpatory method

B. The first sound heard is the systolic pressure

C. The sounds that are heard are generated in heart

D. The loudest sound is the diastolic pressure

7327. Satiety center in hypothalamus is regulated by ________________?
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A. Blood insulin levels

B. Blood glucose levels

C. Gastric dilatation

D. All of the above

7328. Isovolumetric relaxation ends immediately after________________?
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A. When ventricular pressure falls below aortic pressure

B. When ventricular pressure falls below atrial pressure

C. None of the above

D. AV Valve closes

7329. 2nd heart sound is characterized by all except______________?
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A. Marks the onset of diastole

B. Has longer duration than 1st heart sound

C. Is occasionally split

D. Due to closure of semilunar valves

7330. The ventricular repolarization in ECG is best seen in_______________?
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A. Q wave

B. P wave

C. R wave

D. T wave
7331. Intensity of sound is measured in________________?
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A. Diopters

B. Daltons

C. Decibels

D. Pounds

7332. Unmyelinated fibres differ from myelinated fibers in that they ______________?
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A. Have increased excitability

B. Have no power of regeneration

C. Have no association of Schwann cells

D. Have to nodes of Ranvier
7333. First change to occur in the distal segment of cut________________?
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A. Mitosis of schwann cell

B. Axonal degeneration

C. Sprouting

D. Myelin degeneration

7334. Lesions within the basal ganglia produce the following signs except_______________?
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A. Tremor

B. Hemiballismus

C. Athetosis

D. Hypotonia
7335. Stimulation of barorceptor leads to ________________?
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A. Increased blood pressure, increased heart rate

B. Increased B.P, decreased heart rate

C. Decreased B.P, increased heart rate

D. Decreased B.P , decreased heart rate
7336. The effects of Adrenaline on heart are all except__________________?
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A. Increases heart rate

B. Decreases myocardial irritability

C. Increases oxygen uptake by heart

D. Increases force of contraction

7337. SA node acts as a pacemaker of the heart because of the fact that it_________________?
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A. is capable of generating impulses

B. Has poor cholinergic innervation

C. Has rich sympathetic innervation

D. Generates impulses at the highest rate
7338. Tremors are seen in disorder of_________________?
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A. Parathyroid gland

B. Basal ganglia

C. Pyramidal tract

D. Pain pathway

7339. Sensations of pain from teeth and temperature are carried by_______________?
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A. Ventral spinothalamic tract

B. Corticobulbar tract

C. Corticospinal tract

D. Lateral spinothalamic tract
7340. Increased functional demand on the heart produces increased size of the myocardium by _______________?
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A. Fatty infiltration

B. Hypertrophy

C. Hyperplasia

D. Increased amounts of fibrous connective tissue