Question 1

Which of the following affects blood flow through the body?

Accepted Answer

A)   blood viscosity
B)   vessel diameter
C)   turbulence
D)   vascular resistance
E)   all of the above

Question 2

The long plateau phase of the cardiac muscle action potential is due to

Accepted Answer

A)   movement of fewer sodium ions across the cell membrane into the cell.
B)   calcium channels remaining open.
C)   increased membrane permeability to potassium ion.
D)   decrease in the amount of calcium diffusing across the membrane.
E)   increased membrane permeability to sodium ions.

Question 3

After losing 25 percent of blood volume in a motorcycle accident, which of the following compensatory responses would occur?

Accepted Answer

A)   increased heart rate
B)   increase of contractility
C)   vasoconstriction of the body wall
D)   venoconstriction of skin vessels
E)   all of the above

Question 4

If the connection between the SA node and AV node becomes blocked,

Accepted Answer

A)   the ventricles will beat faster.
B)   the ventricles will beat more slowly.
C)   the ventricular beat will remain unchanged.
D)   cardiac output will increase.
E)   all of the above

Question 5

The atrioventricular valves permit blood flow

Accepted Answer

A)   in one direction only.
B)   in both directions.
C)   in many directions.
D)   in opposite directions on the right and left.
E)   none of the above

Exam 18: The Heart and Cardiovascular Function

Which of the following affects blood flow through the body?

Correct Answer
verified

If the connection between the SA node and AV node becomes blocked,

Correct Answer
verified

The long plateau phase of the cardiac muscle action potential is due to

Correct Answer
verified

After losing 25 percent of blood volume in a motorcycle accident, which of the following compensatory responses would occur?

Correct Answer
verified

The atrioventricular valves permit blood flow

Correct Answer
verified

Exam 18: The Heart and Cardiovascular Function

Which of the following affects blood flow through the body?

Correct AnswerverifiedShow Answer

If the connection between the SA node and AV node becomes blocked,

Correct AnswerverifiedShow Answer

The long plateau phase of the cardiac muscle action potential is due to

Correct AnswerverifiedShow Answer

After losing 25 percent of blood volume in a motorcycle accident, which of the following compensatory responses would occur?

Correct AnswerverifiedShow Answer

The atrioventricular valves permit blood flow

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified