Ch3

Question 1

1 The primary function of the myocardial working cells include:

Answer 1

C contraction and relaxation

Question 2

2 The ability of cardiac pacemaker cells to generate their own electrical impulses continuously without external, or nervous, stimulation is known as:

Answer 2

A Automaticity

Question 3

3 Which characteristic is specific to the pacemaker sites of the electrical conduction system (I.e., the As a note, the AV junction, and the Purkinje Network fibers)?

Answer 3

C. Conductivity

Question 4

4 The ability of cardiac cells to respond to an electrical stimulus is referred to as:

Answer 4

D Excitability

Question 5

5 Excitability is also referred to as:

Answer 5

A Irritability

Question 6

6 The ability of cardiac cells to receive an electrical stimulus and then transmit the stimulus to other cardiac cells is known as:

Answer 6

D Conductivity

Question 7

7 Conductivity is a characteristic shared by all cardiac cells.

Answer 7

B False

Question 8

8 Cardiac muscle cell groups that function collectively as a unit are known as:

Question 9

9 Repolarization is a slow process than depolarization.

Answer 9

A False

Question 10

10 The period when repolarization is almost complete in the cardiac cell can be stimulated to contract prematurely is stronger than normal is known as:

Question 11

11 Cardiac depolarization may be thought of as the period during which __ ions rush into the cell.

Answer 11

A Potassium

Question 12

12 At the end of cardiac depolarization, __ ions return to the inside of the cell.

Answer 12

A potassium

Question 13

13 The resting state of a card Excel, where in the inside of the cell is electrically negative related to the outside of the cell, is called:

Answer 13

C Depolarization

Question 14

14 The point at which a stimulus will produce a cell response is called the:

Answer 14

A Active state

Question 15

15 An increase in potassium blood levels is known as:

Answer 15

D Hyperkalemia