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Medical Science Mcqs 5254 MCQs [All-Courses]

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

The following factors increase the cardiac output except______________?

A Preload

B After load

C Heart rate

D Myocardial contractility

Review Detailed Answer

Correct Answer: After load

SA node acts as a pacemaker of the heart because of the fact that it_________________?

A is capable of generating impulses

B Has rich sympathetic innervation

C Has poor cholinergic innervation

D Generates impulses at the highest rate

Review Detailed Answer

Correct Answer: Generates impulses at the highest rate

Increase in carotid sinus pressure produces__________________?

A Reflex hyperpnea

B Reflex Hypercapnia

C Reflex tachycardia

D Reflex Hypercapnia

Review Detailed Answer

Correct Answer: Reflex Hypercapnia

The effects of Adrenaline on heart are all except__________________?

A Increases heart rate

B Decreases myocardial irritability

C Increases force of contraction

D Increases oxygen uptake by heart

Review Detailed Answer

Correct Answer: Decreases myocardial irritability

First heart sound occurs during the period of________________?

A Isotonic relaxation

B Isovolumetric relaxation

C Isovolumetric contraction

D Isotonic contraction

Review Detailed Answer

Correct Answer: Isovolumetric contraction

Cardiac output in L/min divided by heart rate equals_______________?

A Cardiac efficiency

B Cardiac index

C Mean stroke volume

D Mean arterial pressure

Review Detailed Answer

Correct Answer: Mean stroke volume

Under resting condition the cardiac output is _______ L/ min ?

A 2.5

B 4.25

C 5.25

D 9.5

Review Detailed Answer

Correct Answer: 5.25

Conduction velocity is least in_______________?

A AV node

B SA node

C SA node

D Purkinje fibers

Review Detailed Answer

Correct Answer: AV node

Increased functional demand on the heart produces increased size of the myocardium by _______________?

A Hyperplasia

B Hypertrophy

C Fatty infiltration

D Increased amounts of fibrous connective tissue

Review Detailed Answer

Correct Answer: Hypertrophy

Peripheral resistance is maximum in_______________?

A Aorta

B Artery

C Arteriole

D Vein

Review Detailed Answer

Correct Answer: Arteriole

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Medical Science Mcqs 5254 MCQs [All-Courses]

All Topics 5254

All Topics 5254

The following factors increase the cardiac output except______________?

SA node acts as a pacemaker of the heart because of the fact that it_________________?

Increase in carotid sinus pressure produces__________________?

The effects of Adrenaline on heart are all except__________________?

First heart sound occurs during the period of________________?

Cardiac output in L/min divided by heart rate equals_______________?

Under resting condition the cardiac output is _______ L/ min ?

Conduction velocity is least in_______________?

Increased functional demand on the heart produces increased size of the myocardium by _______________?

Peripheral resistance is maximum in_______________?