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Exam 22: Heart

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Question 1

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The serous fluid within the pericardial cavity works to

A) lubricate the membranes of the serous pericardium.
B) slow the heart rate.
C) equalize the pressure in the great vessels.
D) eliminate blood pressure spikes.

E) A) and B)
F) A) and D)

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Question 2

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Which does not drain into the coronary sinus?

A) Great cardiac vein
B) Small cardiac vein
C) Anterior interventricular vein
D) Middle cardiac vein
E) No exceptions; all choices drain into the coronary sinus.

F) B) and C)
G) A) and E)

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Question 3

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The left atrium and left ventricle are part of which circuit of the cardiovascular system?

The inferior,conical end of the heart is called the _______________.

All of the heart's sulci house blood vessels that supply the myocardium.

The middle layer of the heart wall that is made of cardiac muscle tissue is the ________________.

The right and left coronary arteries are the only branches of the ascending aorta.

In an EKG,the P wave is generated when the

Parasympathetic innervation of the heart occurs via

The property that allows the heart to initiate each heartbeat itself is called __________________.

It is during weeks 5-8 that the single heart tube of the embryo becomes partitioned into four chambers and the main vessels that leave and enter the heart form.

During a cardiac cycle,how many of the four chambers contract at any one time?

The connections shared by arteries that allow them to shunt blood from one artery to another are called _________________.

Most coronary blood flow occurs during ventricular ________________.

The right border of the heart is supplied by the

The term used to describe the inadequate blood flow to a structure caused by obstruction of the blood supply is _________________.

The sequence of events in the transmission of an impulse through the heart muscle is A: AV node B: AV bundle C: SA node D: through the atria E: through the ventricles F: bundle branches G: Purkinje fibers

About seventy percent of the ventricle filling is achieved passively without the contraction of the atria.

The atria are separated from the ventricles externally by the

Because of the constant inflow of blood,the atria are thick-walled and located inferiorly in the heart.