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1 | |
Which one of the following is not part of the cardiovascular system? |
| | A) | arteries |
| | B) | heart |
| | C) | blood |
| | D) | veins |
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2 | |
Compared to arteries, arterioles |
| | A) | are smaller in diameter. |
| | B) | can be relaxed by hormones. |
| | C) | collapse when empty. |
| | D) | a and b are correct. |
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3 | |
The transfer of oxygen to the body's cells takes place in the |
| | A) | arteries. |
| | B) | arterioles. |
| | C) | capillaries. |
| | D) | venules. |
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4 | |
Unidirectional valves that prevent the blood from flowing backward are found in the |
| | A) | arteries. |
| | B) | veins. |
| | C) | capillaries. |
| | D) | arterioles. |
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5 | |
Fluid is driven through the lymphatic system by |
| | A) | contraction of the walls of the lymphatic vessels. |
| | B) | pressure created by the pumping of the heart. |
| | C) | contractions of the lymph nodes. |
| | D) | squeezing of the lymphatic vessels by the body's muscles. |
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6 | |
The lymphatic system is important because it |
| | A) | collects liquid lost from the circulatory system. |
| | B) | returns proteins to circulation. |
| | C) | carries bacteria to the lymph nodes for destruction. |
| | D) | does all of the above |
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7 | |
Plasma is made up of water and ________. |
| | A) | metabolites and wastes. |
| | B) | salts and ions. |
| | C) | proteins. |
| | D) | all of the above |
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8 | |
The component of blood that is responsible for clotting is |
| | A) | platelets. |
| | B) | erythrocytes. |
| | C) | neutrophils. |
| | D) | basophils. |
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9 | |
Which one of the following series represents the correct path of mammalian blood circulation? |
| | A) | left atrium, left ventricle, lungs, right atrium, right ventricle, body |
| | B) | right atrium, right ventricle, lungs, left atrium, left ventricle, body |
| | C) | left atrium, left ventricle, right atrium, right ventricle, lungs, body |
| | D) | right atrium, lungs, right ventricle, left atrium, body, left ventricle |
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10 | |
The rhythmic beating of the heart is initiated by the |
| | A) | Purkinje fibers |
| | B) | bundle of His |
| | C) | atrioventricular node |
| | D) | sinoatrial node |
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11 | |
The "lub" of the "lub-dub" sound the heart makes is caused by the |
| | A) | closing of the mitral and tricuspid valves. |
| | B) | closing of the pulmonary and aortic valves. |
| | C) | sound of blood rushing into the atria. |
| | D) | sound of blood rushing into the ventricles. |
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12 | |
The location in the lung where the exchange of gases takes place is the |
| | A) | bronchus. |
| | B) | alveolus. |
| | C) | bronchiole. |
| | D) | pleural membrane. |
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13 | |
The expansion of the lung and inhalation of air are in part the result of |
| | A) | the muscles of the lungs relaxing, allowing the lungs to get larger. |
| | B) | decreased pressure of the interpleural fluid. |
| | C) | the contraction of the muscles of the diaphragm. |
| | D) | a and b only |
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14 | |
The flow rate of blood through the capillaries is less than the flow rate of blood through the arteries. |
| | A) | true |
| | B) | false |
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15 | |
Hemoglobin, contained in leukocytes, transports oxygen throughout the body. |
| | A) | true |
| | B) | false |
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16 | |
Pulmonary veins carry blood that is rich in oxygen. |
| | A) | true |
| | B) | false |
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17 | |
The Bohr effect explains why super nitric oxide causes the expansion of blood vessels |
| | A) | true |
| | B) | false |
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18 | |
The incidence of cancer per 1,000 people is uniform throughout the United States. |
| | A) | true |
| | B) | false |
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19 | |
The p53 protein, a tumor suppressor sometimes called the "guardian angel" of the cell, inspects the DNA to ensure it is ready to replicate. |
| | A) | true |
| | B) | false |
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20 | |
Each pack of cigarettes smoked shortens a person's life by three and one-half hours. |
| | A) | true |
| | B) | false |
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