Question 1

The apex of the heart is normally pointed

Accepted Answer

A)  at the midline.
B)  to the left of the midline.
C)  to the right of the midline.
D)  is different for males and females
E)  posteriorly. B

Question 2

Contraction of the ventricles of the heart leads to blood moving directly

Accepted Answer

A)  into arteries.
B)  into capillaries.
C)  into veins.
D)  through an atrioventricular valve.
E)  through the apex. A

Question 3

Isovolumetric contraction is the phase of the cardiac cardiac cycle in which

Accepted Answer

A)  the semilunar valves are open.
B)  ventricular repolarization occurs.
C)  atrial depolarization occurs.
D)  oxygenated blood leaves the heart into the systemic circulation.
E)  ventricular pressure increases and ventricular volume remains the same. E

Question 4

In comparison to a sedentary individual,a well-trained athlete will usually have all the following characteristics EXCEPT

Accepted Answer

A)  a higher cardiac reserve.
B)  a higher resting cardiac output.
C)  a higher stroke volume.
D)  hypertrophy of the heart.
E)  resting bradycardia.

Question 5

The second heart sound (dupp)closely follows which of the events listed below?

Accepted Answer

A)  Valvular stenosis
B)  Semilunar valves opening
C)  Atrioventricular valves closing
D)  Semilunar valves closing
E)  Atrioventricular valves opening

Question 6

Cardiac output is the volume of blood ejected from the _____ ventricle into the _____ each minute.

Accepted Answer

A)  left,aorta
B)  right,aorta
C)  left or right,aorta or pulmonary trunk
D)  right,pulmonary trunk
E)  both left and right aorta are correct

Question 7

Cardiac muscle fibers are electrically connected to neighboring fibers by

Accepted Answer

A)  desmosomes.
B)  tight junctions.
C)  gap junctions.
D)  interneurons.
E)  chordae tendinae.

Question 8

Which blood vessel shown in the figure carries oxygenated blood to the lower thoracic cavity and the abdominal cavity of the body?

Accepted Answer

A)  A
B)  B
C)  E
D)  F
E)  H

Question 9

Which labeled blood vessel shown in the diagram is the left common carotid artery?

Accepted Answer

A)  A
B)  B
C)  E
D)  F
E)  H

Question 10

Which of the following type of muscle contains the largest number of mitochondria per cell?

Accepted Answer

A)  Smooth muscle
B)  Skeletal muscle
C)  Cardiac muscle
D)  All the muscle types contain approximately the same number.
E)  Mitochondria are not found in muscle cells.

Question 11

What labeled structure in the figure increases the blood volume capacity of an atrium?

Accepted Answer

A)  B
B)  G
C)  D
D)  F

Question 12

Which of the following electrocardiogram (EKG)waves represents atrial depolarization?

Accepted Answer

A)  R wave
B)  T wave
C)  S wave
D)  P wave
E)  Q wave

Question 13

Which portion of the heart wall is responsible for the pumping action?

Accepted Answer

A)  E
B)  F
C)  G
D)  H
E)  I

Question 14

The membrane that surrounds and protects the heart is called the

Accepted Answer

A)  pericardium.
B)  pleura.
C)  myocardium.
D)  mediastinum.
E)  endocardium.

Question 15

In the diagram,where is the left auricle of the left atrium?

Accepted Answer

A)  C
B)  F
C)  G
D)  H
E)  I

Question 16

A corrective cardiac procedure in which a large piece of a patient's own latissimus dorsi muscle is wrapped around the heart and stimulated by an implanted pacemaker to assist the pumping action of a damaged heart.

Accepted Answer

A)  myocardial infarction
B)  tetrology of Fallot
C)  cardiomyopathy
D)  cardiomegaly
E)  cardiomyoplasty

Question 17

Which labeled structure shown in the diagram is a pouch-like extension that serves to slightly increase the capacity of an atrium?

Accepted Answer

A)  F
B)  E
C)  G
D)  I
E)  D

Question 18

What type of tissue comprises the valves of the heart?

Accepted Answer

A)  Dense connective tissue
B)  Areolar connective tissue
C)  Hyaline cartilage
D)  Cardiac muscle tissue
E)  Adipose tissue

Question 19

Heart murmurs are often heard in individuals with abnormalities in the _____ of the heart.

Accepted Answer

A)  valves
B)  myocardium
C)  SA node
D)  AV node
E)  endocardium

Question 20

In the diagram,which labeled structures are atrioventricular valves?

Accepted Answer

A)  B only
B)  D only
C)  A and C
D)  B and D
E)  A,B,C and D

Exam 20: The Cardiovascular System: the Heart