Quiz 2-AHPexam&Cardiac Conduction

Question 1

The primary functions of the myocardial working cells include:

Select one:

a. Automaticity
b. Regeneration
c. contraction and relaxation
d. impulse propagation

Answer 1

c. contraction and relaxation

Question 2

The intrinsic firing rate of the SA node is ______BPM.

Select one:

a. 20-60
b. 40-80
c. 60-100
d. 80-100

Answer 2

c. 60-100

Question 3

The interventricular septum is the wall between the:

Select one:

a. Right and left atrium
b. Right and left ventricle
c. Inferior and superior chambers
d. Inferior and superior vena cava

Answer 3

b. right and left ventricle

Question 4

The electrocardiogram is used to:

Select one:

a. determine pulse rate
b. detect valvular dysfunction
c. Evaluate electrical activity in the heart
d. Determine whether the heart is beating

Answer 4

c. Evaluate electrical activity in the heart

Question 5

Purkinje’s network fibers can be identified only with the aid of a microscope?

Select one:

a. True
b. False

Answer 5

a. True

Question 6

The intrinsic firing rate of the Purkinje network is ______BPM.

Select one:

a. 40-80
b. 40-60
c. 20-40
d. 10-20

Answer 6

c. 20-40

Question 7

Purkinje’s network fibers are smaller in diameter than ordinary cardiac muscle fibers.

Select one:

a. True
b. False

Answer 7

b. False

Question 8

The SA node receives it blood supply primarily from the:

Select one:

a. Left coronary artery
b. Great cardiac vein
c. Right coronary artery
d. aorta

Answer 8

c. Right coronary artery

Question 9

The AV node is located in the:

Select one:

a. right atrium
b. left ventricle
c. Purkinje fiber tract
d. atrioventricular septum

Answer 9

a. right atrium

Question 10

The normal conduction pattern of the heart follows the sequence:

1. SA node
2. Purkinje fibers
3. Bundle of His
4. AV node
5. Bundle branches
6. Internodal pathways

Select one:

a. 1, 2, 3, 5, 6, 4
b. 1, 6, 4, 3, 5, 2
c. 1, 6, 4, 2, 3, 5
d. 6. 1, 5, 4, 3, 2

Answer 10

b. 1, 6, 4, 3, 5, 2 (SA node, internodal pathways, AV node, bundle of his, bundle branches, purkinje fibers)

Question 11

The sinoatrial node is located in the:

Select one:

a. right atrium
b. right ventricle
c. purkinje fiber tract
d. atrioventricular septum

Answer 11

a. right atrium

Question 12

The intrinsic firing rate of the AV junction is _____ BPM.

Select one:

a. 15-20
b. 35-45
c. 25-35
d. 40-60

Answer 12

d. 40-60

Question 13

______________ internodal tracts or pathways receive the electrical impulse as it leaves the SA node. These tracts distribute the electrical impulse throughout the atria and transmit the impulse from the SA node to the AV node.

Select one:

a. Two
b. Three
c. Four
d. Five

Answer 13

b. Three

Question 14

The major blood vessel that receives blood from the systemic circulation is the:

Select one:

a. superior vena cava
b. great cardiac vein
c. inferior vena cava
d. pulmonary artery

Answer 14

c. inferior vena cava

Question 15

What is the specialized group of cardiac fibers conducting electrical activity from the SA node to the left atrium?

Select one:

a. Purkinje network
b. Bundle of His
c. Bachman’s Bundle
d. Intercalated disks

Answer 15

c. Bachman’s Bundle