Question 1

Contractions of the papillary muscles

Accepted Answer

A) close the atrioventricular valves. 
B) close the semilunar valves. 
C) eject blood from the ventricles. 
D) prevent the atrioventricular valves from reversing into the atria. 
E) eject blood from the atria into the ventricles. 
A) close the atrioventricular valves. 
B) close the semilunar valves. 
C) eject blood from the ventricles. 
D) prevent the atrioventricular valves from reversing into the atria. 
E) eject blood from the atria into the ventricles. D

Question 2

Most of the mass of the heart lies

Accepted Answer

A) left of midline. 
B) right of midline. 
C) on the sagittal plane. 
D) inferior to the midline. 
E) on the midline of the body. 
A) left of midline. 
B) right of midline. 
C) on the sagittal plane. 
D) inferior to the midline. 
E) on the midline of the body. A

Question 3

In a procedure known as ________,an inflatable balloon at the end of a catheter is used to press plaque back against the vessel wall.

Accepted Answer

A) balloon angioplasty 
B) coronary arterial bypass graft 
C) intravenous catheterization 
D) ablation 
E) atherectomy 
A) balloon angioplasty 
B) coronary arterial bypass graft 
C) intravenous catheterization 
D) ablation 
E) atherectomy A

Question 4

The amount of blood returning to the heart is the

Accepted Answer

A) afterload. 
B) stroke volume. 
C) end-diastolic volume. 
D) cardiac reserve. 
E) venous return. 
A) afterload. 
B) stroke volume. 
C) end-diastolic volume. 
D) cardiac reserve. 
E) venous return.

Question 5

A doctor tells her nursing students that it is important to monitor patients' blood pressure when they are receiving verapamil (a calcium channel blocker).Why?

Accepted Answer

Calcium channel blockers inhibit the mov

Question 6

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What occurs at the area labeled "B" on the graph?

Accepted Answer

A) Ventricular ejection occurs. 
B) AV valve closes. 
C) Semilunar valve opens. 
D) Semilunar valve closes. 
E) AV valve opens. 
A) Ventricular ejection occurs. 
B) AV valve closes. 
C) Semilunar valve opens. 
D) Semilunar valve closes. 
E) AV valve opens.

Question 7

Rupture of the papillary muscles in the left ventricle may result in

Accepted Answer

A) mitral regurgitation. 
B) mitral valve prolapse. 
C) bicuspid regurgitation. 
D) bicuspid prolapse. 
E) All of the answers are correct. 
A) mitral regurgitation. 
B) mitral valve prolapse. 
C) bicuspid regurgitation. 
D) bicuspid prolapse. 
E) All of the answers are correct.

Question 8

The muscle layer of the heart is the

Accepted Answer

A) epicardium. 
B) myocardium. 
C) endocardium. 
D) parietal pericardium. 
E) mediastinum. 
A) epicardium. 
B) myocardium. 
C) endocardium. 
D) parietal pericardium. 
E) mediastinum.

Question 9

The interventricular sulci and coronary sulcus

Accepted Answer

A) contain fat. 
B) contain arteries. 
C) contain veins. 
D) are grooves on the surface of the heart. 
E) All of the answers are correct. 
A) contain fat. 
B) contain arteries. 
C) contain veins. 
D) are grooves on the surface of the heart. 
E) All of the answers are correct.

Question 10

A fine tubular wire mesh called a ________ may be inserted into a coronary vessel,holding it open.

Accepted Answer

A) angioplast 
B) stent 
C) angiogram 
D) keyhole 
E) catheter 
A) angioplast 
B) stent 
C) angiogram 
D) keyhole 
E) catheter

Question 11

The circumflex branch and the anterior interventricular artery are branches of the

Accepted Answer

A) right coronary artery. 
B) left coronary artery. 
C) interventricular artery. 
D) coronary sinus. 
E) aorta. 
A) right coronary artery. 
B) left coronary artery. 
C) interventricular artery. 
D) coronary sinus. 
E) aorta.

Question 12

Cardiac output is increased by

Accepted Answer

A) sympathetic stimulation. 
B) increased end systolic volume. 
C) decreased end diastolic volume. 
D) decreased venous return. 
E) inhibiting the atrial reflex. 
A) sympathetic stimulation. 
B) increased end systolic volume. 
C) decreased end diastolic volume. 
D) decreased venous return. 
E) inhibiting the atrial reflex.

Question 13

The adult heart is roughly the size of

Accepted Answer

A) the liver. 
B) a man's clenched fist. 
C) the gallbladder. 
D) the hand of a 10-year-old. 
E) the brain. 
A) the liver. 
B) a man's clenched fist. 
C) the gallbladder. 
D) the hand of a 10-year-old. 
E) the brain.

Question 14

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What volume is labeled "F" on the graph?

Accepted Answer

A) cardiac output 
B) end-systolic volume 
C) end-diastolic volume 
D) total cardiac volume 
E) stroke volume 
A) cardiac output 
B) end-systolic volume 
C) end-diastolic volume 
D) total cardiac volume 
E) stroke volume

Question 15

Tetanic muscle contractions don't occur in a normal cardiac muscle because

Accepted Answer

A) cardiac muscle tissue contracts on its own. 
B) neural stimulation is lacking. 
C) the refractory period lasts until the muscle relaxes. 
D) the refractory period ends before the muscle reaches peak tension. 
E) potassium channels outnumber sodium channels. 
A) cardiac muscle tissue contracts on its own. 
B) neural stimulation is lacking. 
C) the refractory period lasts until the muscle relaxes. 
D) the refractory period ends before the muscle reaches peak tension. 
E) potassium channels outnumber sodium channels.

Question 16

The first heart sound ("lubb")is associated with

Accepted Answer

A) atrial systole. 
B) closing of the atrioventricular valves. 
C) opening of the atrioventricular valves. 
D) closing of the semilunar valves. 
E) opening of the semilunar valves. 
A) atrial systole. 
B) closing of the atrioventricular valves. 
C) opening of the atrioventricular valves. 
D) closing of the semilunar valves. 
E) opening of the semilunar valves.

Question 17

The systolic part (both atrial and ventricular)of a cardiac cycle lasts,on average,

Accepted Answer

A) 3 seconds. 
B) 370 msec. 
C) 5 seconds. 
D) 100 msec. 
E) 800 msec. 
A) 3 seconds. 
B) 370 msec. 
C) 5 seconds. 
D) 100 msec. 
E) 800 msec.

Question 18

The pulmonary arteries carry blood to the

Accepted Answer

A) heart. 
B) lungs. 
C) brain. 
D) intestines. 
E) liver. 
A) heart. 
B) lungs. 
C) brain. 
D) intestines. 
E) liver.

Question 19

Drugs that block the beta-one adrenergic receptors will

Accepted Answer

A) increase heart rate. 
B) decrease heart rate. 
C) increase contractility. 
D) increase cardiac output. 
E) decrease the end-systolic volume. 
A) increase heart rate. 
B) decrease heart rate. 
C) increase contractility. 
D) increase cardiac output. 
E) decrease the end-systolic volume.

Question 20

Muscular ridges on the inner surface of the ventricles are called

Accepted Answer

A) coronary sinuses. 
B) trabeculae carneae. 
C) intercalated discs. 
D) papillary muscles. 
E) chordate tendinae. 
A) coronary sinuses. 
B) trabeculae carneae. 
C) intercalated discs. 
D) papillary muscles. 
E) chordate tendinae.

Exam 20: The Heart

Contractions of the papillary muscles

Most of the mass of the heart lies

In a procedure known as ________,an inflatable balloon at the end of a catheter is used to press plaque back against the vessel wall.

The amount of blood returning to the heart is the

A doctor tells her nursing students that it is important to monitor patients' blood pressure when they are receiving verapamil (a calcium channel blocker).Why?

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the area labeled "B" on the graph?

Rupture of the papillary muscles in the left ventricle may result in

The muscle layer of the heart is the

The interventricular sulci and coronary sulcus

A fine tubular wire mesh called a ________ may be inserted into a coronary vessel,holding it open.

The circumflex branch and the anterior interventricular artery are branches of the

Cardiac output is increased by

The adult heart is roughly the size of

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What volume is labeled "F" on the graph?

Tetanic muscle contractions don't occur in a normal cardiac muscle because

The first heart sound ("lubb")is associated with

The systolic part (both atrial and ventricular)of a cardiac cycle lasts,on average,

The pulmonary arteries carry blood to the

Drugs that block the beta-one adrenergic receptors will

Muscular ridges on the inner surface of the ventricles are called

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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