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| 1 | |
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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| 2 | |
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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| 3 | |
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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| 4 | |
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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| 5 | |
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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| 6 | |
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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| 7 | |
The component of blood that is responsible for clotting is _____________. |
| | A) | platelets. |
| | B) | erythrocytes. |
| | C) | neutrophils. |
| | D) | basophils. |
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| 8 | |
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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| 9 | |
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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| 10 | |
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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| 11 | |
The mammalian heart is a one-cycle pump. |
| | A) | True |
| | B) | False |
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| 12 | |
Arthropods have an open circulatory system in which blood in pumped through a network of open-ended channels that empty into cavities in the body. |
| | A) | True |
| | B) | False |
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| 13 | |
The circulatory system and endocrine system are interrelated in which of the following ways? |
| | A) | The glands of the endocrine system produce and secrete hormones that are delivered to other body sites via the circulatory system. |
| | B) | Only the temperature of blood regulates the rate at which many endocrine glands produce hormones. |
| | C) | Hormones produced by the endocrine system are absorbed by lymphocytes and delivered to other body sites. |
| | D) | Hormones produced by the endocrine system control the activities of blood cells. |
| | E) | The circulatory system is a part of the endocrine system. |
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| 14 | |
Arrange the following in order from largest to smallest. |
| | A) | capillaries, arteries, arterioles. |
| | B) | capillaries, arterioles, arteries. |
| | C) | arterioles, arteries, capillaries. |
| | D) | arteries, arterioles, capillaries. |
| | E) | arteries, capillaries, arterioles. |
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| 15 | |
In the vertebrate circulatory system, the fluid that leaks out of capillaries is returned via the _________________. |
| | A) | veins |
| | B) | lymphatic vessels |
| | C) | venules |
| | D) | all of the above |
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| 16 | |
In humans, blood flows in which direction? |
| | A) | venule to arteriole |
| | B) | arteriole to artery |
| | C) | capillary to venule |
| | D) | vein to artery |
| | E) | none of the above |
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| 17 | |
Which heart chamber pumps blood to the lungs? |
| | A) | right atrium |
| | B) | left atrium |
| | C) | right ventricle |
| | D) | left ventricle |
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| 18 | |
The fraction of the total volume of the blood that is occupied by ___________ is referred to as the blood's hematocrit. |
| | A) | red blood cells |
| | B) | white blood cells |
| | C) | platelets |
| | D) | plasma |
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| 19 | |
Cardiovascular diseases such as heart attacks, angina pectoris, and strokes are primarily caused by fatty deposits in __________ that interfere with blood flow. |
| | A) | arteries |
| | B) | capillaries |
| | C) | veins |
| | D) | all of the above |
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| 20 | |
___________________ have a gastrovascular cavity that functions in digestion and circulation. |
| | A) | Flatworms |
| | B) | Annelids |
| | C) | All vertebrates |
| | D) | All of the above |
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