Chapter 5

Question 1

True or false: The endocardium is the outer lining of the heart

Answer 1

False-inner lining of the heart

Question 2

The tricuspid valve controls the opening between the

a. right atrium and right ventricle
b. right atrium and left ventricle
c. left ventricle and left atrium
d. right atrium and left choroid

Answer 2

a. right atrium and right ventricle

Question 3

True or false: pulmonary circulation is the flow of blood through out the whole body>

Answer 3

False: flow of blood between heart and lungs only

Question 4

The sinoatrial node (SA) is known as the natural pacemaker of the heart because:

a. it takes the job of the heart and lungs
b. it takes the job of the heart only
c. it establishes the digestive cycle
d. it establishes the basis rhythm/rate of heartbeat

Answer 4

d. it establishes the basis rhythm/rate of heartbeat

Question 5

True or false: Purkinje fibers are specialized conductive fibers in the walls of the ventricles that relay electrical impulses to the cells of the ventricles, causing the ventricles to contract.

Answer 5

True