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48 Cards in this Set
- Front
- Back
True & False
In men, red blood cell counts average about 4,800,000 per cubic millimeter of blood. |
False
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|
True & False
Eosinophils are the least numerous of the white blood cells, numbering only 0.5% to 1 % of the total leukocyte count. |
False
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|
True & False
Type AB blood contains both the A and B antigen on its red blood cell. |
True
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|
True & False
The terms paced cell volume and hematocrit are interchangeable. |
True
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|
True & False
The buffy coat is composed of all the formed elements except red blood cells. |
True
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|
True & False
A drop in blood oxygen levels stimulates an increase in blood cell formation. |
True
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|
True & False
The nuclei of red blood cells and white blood cells are almost identical in size. |
false
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True & False
The mitral valve has three flaps. |
False
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True & False
Arteries always carry blood away fiom the heart. |
True
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|
True & False
Systemic circulation includes blood flow to all parts of the body except the lungs. |
True
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|
True & False
There are two umbilical arteries and one umbilical vein. |
True
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|
True & False
The visceral pericardium adheres to the surface of the heart. |
True
|
|
True & False
The "receiving chambers" of the heart are the atria. |
True
|
|
True & False
The SA node resides primarily in the right atrial wall. |
True
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|
True & False
The midline of the body divides the heart into equal right and left halves. |
False
|
|
True & False
The left ventricle is the driving pump for systemic circulation. |
True
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|
True & False
Blood passing through a semilunar valve will enter an artery. |
True
|
|
True & False
The T wave reflects repolarization of the atria. |
False
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|
True & False
Emotional stress can influence heart rate by impulses going from the cerebrum to the cardiac centers via the hypothalamus. |
True
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|
True & False
Under resting conditions, the SA node fires at an intrinsic rhythrmcal rate of 80 to 85 beats per minute. |
False
|
|
True & False
Cardiac output is determined by multiplying stroke volume and heart rate. |
True
|
|
True & False
Exercise has little effect on cardiac output. |
False
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|
True & False
The difference between systolic and diastolic pressures is termed pulse pressure. |
True
|
|
True & False
The ECG measures the electrical activity of the heart. |
True
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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 |
d. all of the above
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Erythropoesis is the formation of:
a. platelets b. RBC's c. WBC's d. all of the above |
b. RBC's
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In the formation of blood cells, the megakaryoblast ultimately develops into:
a. lymphocytes b. platelets c. monocytes d. both a & b |
b. platelets
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Which of the following is not a leukocyte?
a. basophil b. reticulocyte c. neutrophil d. monocyte |
b. reticulocyte
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All blood cells are derived from:
a. reticulocytes b. proerythroblasts c. basophilic erythroblasts d. hemocytoblasts |
d. hemocytoblasts
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Heme is broken down into this pigment, which is excreted in bile.
a. amino acids b. iron c. bilirubin |
c. bilirubin
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|
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 - |
a. Mother -, father +, infant +
|
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Which of the following is an anticoagulant?
a. calcium ions b. vitamin k c. thromboplastin d. heparin |
d. heparin
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A decrease in red blood cell numbers can result in:
a. polycythemia b. anemia c. toxemia d. leukemia |
b. anemia
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|
The muscular layer of the heart wall is the:
a. epicardium b. pericardium c. myocardium d. endocardium |
c. myocardium
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The right atrioventricular valve is also called the:
a. bicuspid b. tricuspid c. mitral d. aortic |
b. tricuspid
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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 |
d. left ventricle
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Which of the following is a semilunar valve?
a. aortic b. mitral c. tricuspid d. bicuspid |
a. aortic
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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. |
b. tunica adventitia, tunica media, and tunica intima.
|
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Which of the following act as blood reservoirs?
a. arteries b. arterioles c. capillaries d. veins |
d. veins
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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. |
d. all of the above are true of ventricles
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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. |
d. all of the above are part of the conduction system of the heart
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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. |
b. it lies to the right of the midline of the body
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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. |
d. SA node, AV node, bundle of His, and Purkinje fibers.
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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 |
a. electrical conductivity
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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. |
b. blood viscosity and the diameter of arterioles.
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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. |
a. ventricles contracting and the AV valves closing
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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. |
b. systolic sound, indicating the contraction of the ventricles
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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 |
d. axillary
|