Exam 7: The Peripheral Nervous System: Efferent Division

Which of these sequences is the normal sequence of the spread of cardiac excitation?

Why the heart does not require the nervous system to initiate contraction events?

Which of the following actions is done by the semilunar valves?

Match the EKG features, labelled f., with their correct characteristic.a. through a.P wave b.QRS complex c.T wave d.PR interval e.TP interval f.ST segment -time during which ventricles are contracting and emptying

Which of these functions is done by the aortic valve?

The ventricles always depolarize at the same rate as the SA node depolarizes.

Which of these statements correctly applies to the cardiac muscle?

The AV and semilunar valves are never open at the same time.

Compared to cardiac muscle tissue, skeletal muscle tissue has a(n) ____________________ duration for its refractory period.

____________________ carries cholesterol to cells, whereas ____________________ transports it away from cells.

Which of the following correctly describes ectopic focus?

Match the cardiovascular features, labelled a. through d., with their correct characteristic. a.angina pectoris b.embolus c.atherosclerosis d.thrombus -consists of abnormal smooth muscle cells, cholesterol deposits, scar tissue, and possible calcium deposits plaque

An increase in venous return ____________________ the end-diastolic volume.

An increase in the end-diastolic volume ____________________ the stroke volume.

Which cardiac valve prevents regurgitation of blood from the right ventricle to the atrium?

A(n) ____________________ is a clot attached to the wall of a vessel.

Not all forms of LDL are equally harmful to the heart.

The ____________________ are the kinds of blood vessels that experience congestion for congestive heart failure.

The second heart sound is due to closure of the AV valves.

The ____________________ ensures that atrial excitation and contraction are complete before ventricular excitation and contraction commence.