Cardiology MCQs

Cardiology MCQs

Answer these Cardiology MCQs and assess your grip on the subject of Cardiology. Scroll below and get started!

1: cardioinhibitory centers in the __________ receive input from __________.

A.   Chemoreceptors in the aortic arch; the bicuspid (mitral) valve opens.

B.   Papillary muscles and chordae tendineae; chemoreceptors in the aortic arch

C.   Increase its rate and force of contraction; medulla oblongata

D.   Medulla oblongata; chemoreceptors in the aortic arch

2: Beginning around age 25, the maximum heart rate _____ and the resting heart rate _____.

A.   remains same; Decrease in strength

B.   Decreases; remains same

C.   Diathesis-stress model; Depo-provera

D.   Depo-provera; remains same

3: Electrodes for limb leads should be attached to ____.

A.   Detached/loose wire

B.   Have them wear a nose clip

C.   Electrocardiogram

D.   Fleshy portions of the limbs

4: Atrial systole begins __________.

A.   Immediately before the P wave

B.   Immediately after the P wave

C.   During the Q wave

D.   During the S-T segment

5: Hypertension increases ________ causing stroke volume to ________.

A.   Contractility; increase

B.   Afterload; increase

C.   Afterload; decrease

D.   Preload; decrease

6: The closing of the left av valve occurs near the beginning of __________.

A.   Ventricular systole

B.   Atrial systole

C.   Ventricular diastole

D.   Isovolumetric relaxation

7: H f _____.

A.   High frequency

B.   Heart failure

C.   Hot fahrenhite

8: Aortic valve stenosis is characterized by _______.

A.   Increase EDV and therefore, increase stroke volume

B.   Increased resistance to blood flow, thickening of the myocardium and narrowing of the aortic semilunar valve

C.   Increased thickness in the myocardium and a decrease in chamber volume

D.   Increased contractility of the heart, increased EDV and increased preload

9: The one-way nature of the left av valve prevents blood flow from _________.

A.   The left ventricle to the left atrium

B.   The aorta to the left ventricle

C.   The left atrium to the left ventricle

D.   The left ventricle to the aorta

10: After entering the right atrium, the furthest a red blood cell can travel is the _________.

A.   Right ventricle.

B.   Pulmonary trunk.

C.   Superior vena cava.

D.   Ascending aorta

E.   Left atrium.

F.   Superior vena cava

11: Excessive vagal stimulation of the heart will result in _______.

A.   A decrease in heart rate and, eventually, a temporary cessation of the heartbeat

B.   A decrease in the force of contraction

C.   An increase in heart rate

D.   An increase in the force of contraction

12: Electrical signals pass between cardiomyocytes through the _____.

A.   Tight junctions

B.   Gap junctions

C.   Desmosomes

D.   Hemidesmosomes

13: Electrical stimulation as a method of mapping the cerebral cortex was introduced by ____.

A.   Fritsch and Hitzig.

B.   Galvani and Aldini.

C.   Flourens and Hall.

D.   Gall and Spurzheim.

14: Electrical stimulation of a rat's lateral hypothalamus would most likely result in ____.

A.   An increase in food seeking behaviors

B.   A decrease in food seeking behaviors

C.   A decrease in chewing and other reflexes associated with eating

D.   Damage to dopamine-containing axons passing through it

15: Electrical stimulation of the ________ is reinforcing to rats.

A.   Orbitofrontal cortex

B.   Dorsal striatum

C.   Ventral tegmental area

D.   Motor cortex.

16: A block at the av node is likely to appear as a(n) ___________________ on an ecg.

A.   Prolonged PR intervals

B.   Inverted P wave

C.   PVC

D.   Widened QRS complex

E.   Couplet

17: Alternative routes of blood supply are called __________.

A.   Metarterioles

B.   Capillary beds

C.   Preferred channels

D.   Thoroughfare channels.

E.   Anastomoses