Ch 4

Question 1

1 The sinoatrial node is located in the:

Answer 1

A Right atrium

Question 2

2 The AV node is located in the:

Answer 2

D Atrioventricular septum

Question 3

3 The intrinsic firing rate of the AV junction is __ bpm.

Answer 3

D 40 to 60

Question 4

4. The interesting firing rate for the SA node is __ bpm.

Answer 4

C 60 to 100

Question 5

5 The electrocardiogram is used to:

Answer 5

C Evaluate electrical activity of the heart

Question 6

6 The normal condition pattern of the heart follows the sequence:

Answer 6

B

SA node, enter neural pathway, AV node, bundle of His, bundle branches, Purkinje fibers

Question 7

7 The intrinsic firing rate of the Purkinje network is __ bpm.

Answer 7

C 20 to 40

Question 8

8 The SA node receives its blood supply primarily from the:

Answer 8

A Left coronary arterty

Question 9

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

Answer 9

B Three

Question 10

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

Answer 10

A Purkinje network

Question 11

11 The end term ventricular septum is the wall between the:

Answer 11

B Right and left ventricle

Question 12

12 Kincheas networks fibers can be identified only with the aid of a microscope

Answer 12

B False

Question 13

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

Answer 13

B False

Question 14

14 The primary function of the myocardial working cells include:

Answer 14

C Contraction and relaxation

Question 15

15 The major purpose of that receives blood from the systemic circulation is the:

Answer 15

C Inferior vena cava