A & P Ii Test #2

Front 1

True & False
In men, red blood cell counts average about 4,800,000 per cubic millimeter of blood.

Back 1

False

Front 2

True & False
Eosinophils are the least numerous of the white blood cells, numbering only 0.5% to 1 % of the total
leukocyte count.

Back 2

False

Front 3

True & False
Type AB blood contains both the A and B antigen on its red blood cell.

Back 3

True

Front 4

True & False
The terms paced cell volume and hematocrit are interchangeable.

Back 4

True

Front 5

True & False
The buffy coat is composed of all the formed elements except red blood cells.

Back 5

True

Front 6

True & False
A drop in blood oxygen levels stimulates an increase in blood cell formation.

Back 6

True

Front 7

True & False
The nuclei of red blood cells and white blood cells are almost identical in size.

Back 7

false

Front 8

True & False
The mitral valve has three flaps.

Back 8

False

Front 9

True & False
Arteries always carry blood away fiom the heart.

Back 9

True

Front 10

True & False
Systemic circulation includes blood flow to all parts of the body except the lungs.

Back 10

True

Front 11

True & False
There are two umbilical arteries and one umbilical vein.

Back 11

True

Front 12

True & False
The visceral pericardium adheres to the surface of the heart.

Back 12

True

Front 13

True & False
The "receiving chambers" of the heart are the atria.

Back 13

True

Front 14

True & False
The SA node resides primarily in the right atrial wall.

Back 14

True

Front 15

True & False
The midline of the body divides the heart into equal right and left halves.

Back 15

False

Front 16

True & False
The left ventricle is the driving pump for systemic circulation.

Back 16

True

Front 17

True & False
Blood passing through a semilunar valve will enter an artery.

Back 17

True

Front 18

True & False
The T wave reflects repolarization of the atria.

Back 18

False

Front 19

True & False
Emotional stress can influence heart rate by impulses going from the cerebrum to the cardiac centers via the hypothalamus.

Back 19

True

Front 20

True & False
Under resting conditions, the SA node fires at an intrinsic rhythrmcal rate of 80 to 85 beats per minute.

Back 20

False

Front 21

True & False
Cardiac output is determined by multiplying stroke volume and heart rate.

Back 21

True

Front 22

True & False
Exercise has little effect on cardiac output.

Back 22

False

Front 23

True & False
The difference between systolic and diastolic pressures is termed pulse pressure.

Back 23

True

Front 24

True & False
The ECG measures the electrical activity of the heart.

Back 24

True

Front 25

Which of the following is/are involved in determining a person's total blood volume?
a. age
b. body type
c. sex
d. all of the above

Back 25

d. all of the above

Front 26

Erythropoesis is the formation of:
a. platelets
b. RBC's
c. WBC's
d. all of the above

Back 26

b. RBC's

Front 27

In the formation of blood cells, the megakaryoblast ultimately develops into:
a. lymphocytes
b. platelets
c. monocytes
d. both a & b

Back 27

b. platelets

Front 28

Which of the following is not a leukocyte?
a. basophil
b. reticulocyte
c. neutrophil
d. monocyte

Back 28

b. reticulocyte

Front 29

All blood cells are derived from:
a. reticulocytes
b. proerythroblasts
c. basophilic erythroblasts
d. hemocytoblasts

Back 29

d. hemocytoblasts

Front 30

Heme is broken down into this pigment, which is excreted in bile.
a. amino acids
b. iron
c. bilirubin

Back 30

c. bilirubin

Front 31

Which of the following Rh factor combinations could cause agglutination of an infant's red blood cells?
a. Mother -, father +, infant +
b. Mother -, father +, infant -
c. Mother +, father -, infant +
d. Mother +, father +, infant -

Back 31

a. Mother -, father +, infant +

Front 32

Which of the following is an anticoagulant?
a. calcium ions
b. vitamin k
c. thromboplastin
d. heparin

Back 32

d. heparin

Front 33

A decrease in red blood cell numbers can result in:
a. polycythemia
b. anemia
c. toxemia
d. leukemia

Back 33

b. anemia

Front 34

The muscular layer of the heart wall is the:
a. epicardium
b. pericardium
c. myocardium
d. endocardium

Back 34

c. myocardium

Front 35

The right atrioventricular valve is also called the:
a. bicuspid
b. tricuspid
c. mitral
d. aortic

Back 35

b. tricuspid

Front 36

The cavity of the heart that normally has the thickest wall is the:
a. right atrium
b. left atrium
c. right ventricle
d. left ventricle

Back 36

d. left ventricle

Front 37

Which of the following is a semilunar valve?
a. aortic
b. mitral
c. tricuspid
d. bicuspid

Back 37

a. aortic

Front 38

The tissue layers of blood vessels from exterior to interior are:
a. tunica media, tunica intima, and tunica adventitia.
b. tunica adventitia, tunica media, and tunica intima.
c. tunica intima, tunica media, and tunica adventitia.
d. tunica media, tunica adventitia, and tunica intima.

Back 38

b. tunica adventitia, tunica media, and tunica intima.

Front 39

Which of the following act as blood reservoirs?
a. arteries
b. arterioles
c. capillaries
d. veins

Back 39

d. veins

Front 40

Which of the following is not true of the ventricles?
a. They are the pumping chambers of the heart.
b. The myocardium of the ventricles is thicker than that of the atria.
c. The myocardium of the left ventricle is thicker than that of the right ventricle.
d. All of the above are true of ventricles.

Back 40

d. all of the above are true of ventricles

Front 41

Which of the following structures is not part of the conduction system of the heart?
a. Sinoatrial node
b. Atrioventricular node
c. Atrioventricular bundles
d. All of the above are part of the conduction system of the heart.

Back 41

d. all of the above are part of the conduction system of the heart

Front 42

Which of the following is not true of the location of the heart?
a. It lies in the mediastinum.
b. It lies to the right of the midline of the body.
c. It lies behind the body of the sternum.
d. All of the above are true.

Back 42

b. it lies to the right of the midline of the body

Front 43

The normal pattern of impulse conduction through the heart is:
a. AV node, SA node, bundle of His, and Purkinje fibers.
b. AV node, SA node, Purkinje fibers, and bundle of His.
c. SA node, AV node, purkinje fibers, and bundle of His.
d. SA node, AV node, bundle of His, and Purkinje fibers.

Back 43

d. SA node, AV node, bundle of His, and Purkinje fibers.

Front 44

Which of the following most accurately describes what is measured by an electrocardiogram?
a. Electrical conductivity
b. Number of contractions per minute
c. The speed and strength of contractions
d. Any abnormal functioning

Back 44

a. electrical conductivity

Front 45

Peripheral resistance is affected primarily by:
a. the length of myocardial fibers.
b. blood viscosity and the diameter of arterioles.
c. the capacity of the blood reservoirs.
d. elasticity of the heart.

Back 45

b. blood viscosity and the diameter of arterioles.

Front 46

The first heart sound heard, or the lubb sound, is caused by the:
a. the ventricles contracting and the AV valves closing.
b. atria contracting and the SL valves closing.
c. atria contracting and the SL valves closing.
d. ventricles relaxing and the AV valves closing.

Back 46

a. ventricles contracting and the AV valves closing

Front 47

When you take a blood pressure reading, the first sound that you hear (top reading) is the:
a. systolic sound, indicating the relaxation of the ventricles.
b. systolic sound, indicating the contraction of the ventricles.
c. diastolic reading, indicating the contraction of the atria.
d. diastolic sound, indicating the relaxation of the ventricles.

Back 47

b. systolic sound, indicating the contraction of the ventricles

Front 48

Which of the following arteries is not one of the six major pressure points used to stop arterial bleeding?
a. brachial
b. femoral
c. subclavian
d. axillary

Back 48

d. axillary