Chapter 22: Physiology of the Cardiovascular System

Chapter 22: Physiology of the Cardiovascular System

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

Chapter 22-A: Physiology of the Cardiovascular System

 

Test Bank

 

TRUE/FALSE

 

1. Under abnormal conditions, the AV node or the Purkinje fibers may act as ectopic pacemakers.

 

ANS:   T                      DIF:    Memorization                                     REF:    Page 684

TOP:    Conduction System of the Heart

 

2. In order for all the cells of the body to survive, blood supplies to all cells must be equal.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 682

TOP:    Hemodynamics

 

3. The T wave reflects repolarization of the atria.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 686

TOP:    Electrocardiogram (ECG)

 

4. Two important baroreceptors are located in the aorta and the carotid artery.

 

ANS:   T                      DIF:    Memorization                                     REF:    Page 694

TOP:    Factors That Affect Heart Rate

 

5. Emotional stress can influence heart rate by creating impulses that go from the cerebrum to the cardiac centers via the hypothalamus.

 

ANS:   T                      DIF:    Memorization                                     REF:    Page 695

TOP:    Factors That Affect Heart Rate

 

6. An increase in blood temperature tends to slow down heart rate.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 695

TOP:    Factors That Affect Heart Rate

 

7. Grief tends to make the heart beat faster.

 

ANS:   F                      DIF:    Memorization                                     REF:    Page 695

TOP:    Factors That Affect Heart Rate

 

 

Chapter 22-B: Physiology of the Cardiovascular System

 

Test Bank

 

MULTIPLE CHOICE

 

1. If the AV node were forced to assume pacemaker activity, the resulting pulse rate would be _____ beats per minutes.

a.	10 to 30
b.	20 to 40
c.	30 to 50
d.	40 to 60

 

ANS:   D                     DIF:    Memorization                                     REF:    Page 694

TOP:    Conduction System of the Heart

 

2. The normal pattern of impulse conduction through the heart is:

a.	AV node, SA node, bundle of His, and Purkinje fibers.
b.	AV node, SA node, Purkinje fibers, and bundle of His.
c.	SA node, AV node, Purkinje fibers, and bundle of His.
d.	SA node, AV node, bundle of His, and Purkinje fibers.

 

ANS:   D                     DIF:    Memorization

REF:    Page 693|Page 694                             TOP:    Conduction System of the Heart

 

3. Which of the following most accurately describes what is measured by an electrocardiogram?

a.	Electrical conductivity
b.	Number of contractions per minute
c.	The speed and strength of contractions
d.	Any abnormal functioning

 

ANS:   A                     DIF:    Memorization                                     REF:    Page 685

TOP:    Electrocardiogram (ECG)

 

4. Which of the following would not cause an ectopic beat?

a.	Bundle of His
b.	Purkinje fibers
c.	SA node
d.	AV node

 

ANS:   C                     DIF:    Memorization                                     REF:    Page 683

TOP:    Conduction System of the Heart

 

5. The QRS complex represents:

a.	depolarization of the atria.
b.	repolarization of the atria and depolarization of the ventricles.
c.	depolarization of both the atria and ventricles.
d.	repolarization of the ventricles.

 

ANS:   B                     DIF:    Memorization                                     REF:    Page 696

TOP:    ECG Waves

 

6. All of the following will increase heart rate except:

a.	sympathetic stimulation.
b.	a decrease in aortic blood pressure.
c.	a decrease in carotid blood pressure.
d.	stimulation of cold receptors in the skin.

 

ANS:   D                     DIF:    Memorization                                     REF:    Page 695

TOP:    Factors That Affect Heart Rate