Multiple Choice
Identify the letter of the choice that best completes the
statement or answers the question.
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1.
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ATP is a compound that is synthesized when
____.
a. | energy stored in nitrogen is released, forming amino
acids | b. | chemical bonds between carbon atoms are formed during
photosynthesis | c. | energy stored in
chemical bonds is released during cellular respiration | d. | digestive enzymes break amino acids into smaller
parts |
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2.
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Urine, when compared with the initial filtrate,
contains _____.
a. | more glucose. | b. | decomposed red blood cells. | c. | less water, fewer minerals, and more urea. | d. | concentrated amino acids. |
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3.
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What organ is a part of both the respiratory and excretory systems?
a. | kidney | c. | skin | b. | lung | d. | liver |
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4.
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What part of the blood is responsible for making
antibodies?
a. | white blood cells | c. | plasma | b. | platelets | d. | red blood cells |
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5.
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Inhalation (breathing in) occurs when ______
a. | the diaphragm relaxes. | c. | the ribs contract. | b. | the ribs
relax. | d. | the diaphragm contracts. |
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6.
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During a long-distance run on a hot day, an athlete
produces large quantities of sweat. As a result, the kidneys change
the rate of urine production. Why is this change important?
a. | Increased urine production allows more water to remain
in the bloodstream | b. | Decreased urine
production allows the body to conserve water | c. | Decreased urine
production increases the amino acids in the blood | d. | Increased urine production removes amino acids produced because of
running |
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7.
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A characteristic of hormones and enzymes that
allows them to work effectively with other organic molecules is their
_____.
a. | high-energy bonds | b. | concentration of C and H atoms | c. | small size | d. | specific
shape |
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8.
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The skin, lungs, and kidneys all interact to help carry out the ______
a. | digestion of food | b. | coordination of body
movements | c. | production of hormones | d. | removal of waste
products |
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9.
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A filtering unit in a kidney is called a(n) _________.
a. | bladder | c. | urethra | b. | ureter | d. | nephron |
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10.
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Ammonia is converted to urea because ________
a. | urea is less toxic to the
body. | b. | urea can be converted to a
nutrient. | c. | the nitrogenous wastes in urea can be recycled and do
not need to be excreted. | d. | All of the
above |
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11.
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The function of valves in the human circulatory
system is to _____
a. | serve as a cushion to prevent
friction | b. | stimulate the heartbeat | c. | prevent the backward flow of blood | d. | accelerate the flow of blood |
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12.
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In humans, most of the building blocks necessary
for the synthesis of organic compounds come from the _____.
a. | breakdown of white blood
cells | b. | products of excretion | c. | end-products of digestion | d. | products of cellular respiration |
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13.
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Which of the following is NOT a part of the
circulatory system?
a. | heart | c. | air
passageway | b. | blood | d. | blood vessels |
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14.
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Which group of organic compounds includes enzymes?
a. | proteins | c. | sugars | b. | fats | d. | starches |
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15.
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The purpose of the lungs is to _______
a. | supply the body with oxygen. | b. | eliminate carbon dioxide from the body. | c. | eliminate nitrogen from the body. | d. | both A and C. | e. | all of the
above. |
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16.
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Urine leaves the body through the _______
a. | bladder | c. | urethra | b. | intestine | d. | ureter |
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17.
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Which of the following are the smallest of the
blood vessels?
a. | veins | c. | capillaries | b. | lymphatic
cells | d. | arteries |
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18.
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Enzymes are polymers of many ____________ linked together.
a. | proteins | c. | amino acids | b. | simple sugars | d. | starches |
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19.
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Which of the following is NOT a type of blood
vessel?
a. | artery | c. | capillary | b. | vein | d. | lymphatic cell |
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20.
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Cardiac muscle is found in the ________.
a. | hand | c. | heart | b. | lungs | d. | stomach |
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