Each of the following factors will increase cardiac output, except

Each of the following factors will increase cardiac output, except

a. increased venous return.

b. increased sympathetic stimulation.

c. increased parasympathetic stimulation.

d. increased force of contraction.

e. increased heart rate.













Answer: C

Each hemoglobin molecule contains

Each hemoglobin molecule contains

a. one alpha and one beta chain.

b. one heme group.

c. four iron atoms.

d. four alpha chains.

e. a molecule of oxygen and a molecule of carbon dioxide.











Answer: C

Each heme ring in hemoglobin encloses an atom of

Each heme ring in hemoglobin encloses an atom of

a. iron
b. magnesium
c. sodium
d. copper
e. calcium











Answer: A

During ventricular systole, the

During ventricular systole, the

a. AV valves are closed.

b. blood is entering the ventricles.

c. atria are contracting.

d. pressure in the ventricles remains constant.

e. pressure in the aorta remains constant.












Answer: A

During exercise

During exercise

a.vasodilation occurs at the active skeletal muscles.

b. tissue perfusion to the digestive system decreases.

c. venous return increases.

d. both cardiac output and stroke volume increase.

e. All of the answers are correct.












Answer: E

During a bacterial infection you would expect to see increased numbers of

During a bacterial infection you would expect to see increased numbers of

a. eosinophils
b. basophils
c. thrombocytes
d. neutrophils
e. reticulocytes














Answer: D

Depolarization of the ventricles is represented on an electrocardiogram by the

Depolarization of the ventricles is represented on an electrocardiogram by the

a. S wave.

b. QRS complex.

c. P wave.

d. PR complex.

e. T wave.












Answer: B

Depolarization of the atria corresponds to the EKG's

Depolarization of the atria corresponds to the EKG's

a. QRS complex.

b. S-T segment.

c. T wave.

d. P wave.

e. QT interval.












Answer: D

Coronary veins empty into the

Coronary veins empty into the

a. right ventricle.

b. right atrium.

c. left ventricle.

d. left atrium.

e. conus arteriosus.











Answer: B

Contractions of the papillary muscles

Contractions of the papillary muscles

a. eject blood from the atria into the ventricles.

b. prevent the atrioventricular valves from reversing into the atria.

c. close the semilunar valves.

d. eject blood from the ventricles.

e. close the atrioventricular valves.













Answer: B

Consider these results from a blood lab test. Which value is most likely abnormal?

Consider these results from a blood lab test. Which value is most likely abnormal?

a. platelets-280,000/µl

b. leukocytes-8600/µl

c. RBCs-5.2 million/µl

d. hematocrit-44 percent

e. hemoglobin-10.7 g/100 ml














Answer: E

Compared to the right ventricle, the left ventricle has all the following characteristics, except that it

Compared to the right ventricle, the left ventricle has all the following characteristics, except that it

a. pumps a greater volume.
b. is round in cross section
c. works harder
d. produces about four to six times more pressure when it contracts
e. has a thicker wall










Answer: A

Compared to arteries, veins

Compared to arteries, veins

a. have thinner walls.
b. are more elastic.
c. hold their shape better when cut.
d. have more smooth muscle in their tunica media
e. have a pleated endothelium









Answer: A

Cardiac output is increased by

Cardiac output is increased by

a. sympathetic stimulation
b. increased end systolic volume
c. inhibiting the atrial reflex
d. decreased venous return
e. decreased end diastolic volume









Answer: A

Capillaries that have a complete lining are called

Capillaries that have a complete lining are called

a. fenestrated capillaries
b. continuous capillaries
c. sinusoids
d. sinusoidal capillaries
e. vasa vasorum












Answer: B

Blood type is identified primarily by

Blood type is identified primarily by

a. the ABO blood group
b. the HB blood system
c. both the ABO and Rh blood groups
d. the Kahn blood group
e. the Rh blood group both














Answer: A

Blood returning to the heart from the systemic circuit first enters the

Blood returning to the heart from the systemic circuit first enters the

a. conus arteriosus
b. right atrium
c. right ventricle
d. left atrium
e. left ventricle














Answer: B

Blood returning to the heart from the pulmonary circuit first enters the

Blood returning to the heart from the pulmonary circuit first enters the

a. conus arteriosus
b. right atrium
c. left ventricle
d. left atrium
e. right ventricle















Answer: D

Blood pressure is lowest in the

Blood pressure is lowest in the

a. veins
b. venules
c. arteries
d. capillaries
e. arterioles











Answer: A

Blood pressure increases with all of the following, except increased

Blood pressure increases with all of the following, except increased

a. peripheral resistance.
b. blood volume
c. parasympathetic innervation
d. cardiac output.
e. force of cardiac contraction














Answer: C