Cardiovascular System Exam

Cardiovascular System Exam >> Introductory Human Physiology

Introductory Human Physiology – All Quizzes Exam Pack (100% Correct)

Download PDF

Get All Questions Answer.

*Please Do Not Click On The Options.

* If You Click Mistakenly Then Please Refresh The Page To Get The Right Answers.

1 point

begins in the atria and travels in the same direction as the depolarization wave.

results from phase 2 of the fast action potential.

is represented by the T wave on the electrocardiogram (ECG).

is represented by the QRS complex on the electrocardiogram (ECG)

1 point

duration of phase 0 will increase.

duration of phase 2 will decrease.

duration of phase 1 will increase.

absolute refractory period will lengthen.

1 point

Repolarization in Phase 3 is due to potassium efflux (exit) from the cell.

Phase 2 depolarization is caused by an increase in sodium influx (entry) into the cell.

Slow depolarization in phase 4 is due to calcium efflux (exit) from the cell.

Phase 3 is caused by the opening of the funny sodium channels.

1 point

nervous impulses to papillary muscles.

passive recoil of valves.

changes in pressure in adjacent chambers.

mechanical stretching of the fibers attached to the valves as the myocardium contracts and relaxes.

1 point

Purkinje fibers

Atrioventricular (AV) node

Bundle of HIS

Sinoatrial (SA) node

1 point

P-wave duration

T-wave duration

QT interval

PR interval

7. Due to differences in opposing forces, there is usually a net _____ occurring at the arteriolar end of most capillaries coupled with net ___ at the venous end.

1 point

absorption; filtration

filtration; absorption

1 point

an increase in pressure in the large arteries of that organ.

an increase in capillary pressure in that organ.

a decrease in both capillary and venous pressures in that organ.

a decrease in blood flow to that organ resulting from the decreased blood pressure.

1 point

decreasing end diastolic volume

increasing the stroke volume

decreasing the ejection fraction

increasing heart rate

1 point

100%

80%

60%

50%

(i) velocity of blood flow in capillaries

(ii) velocity of blood flow in aorta

1 point

(ii) > (i)

(i) = or nearly = (ii)

(i) > (ii)

1 point

decreased firing

had no change in their firing rate

increased firing