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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The
heart and the blood vessels are separate organs that form the a. | skeletal
system. | c. | reproductive
system. | b. | circulatory system. | d. | digestive system. | | | | |
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2.
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Yellow marrow a. | provides internal support to spongy
bone. | b. | produces red blood cells. | c. | is found only in
lower vertebrates. | d. | consists mainly of fat that stores
energy. | | |
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3.
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Refer
to the illustration above. The compact bone is labeled
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4.
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Bone
loss may be slowed by a. | calcium. | c. | a balanced diet. | b. | regular
exercise. | d. | All of the
above | | | | |
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5.
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The
functional unit of muscle contraction is called the a. | myofibril. | c. | muscle
fiber. | b. | sarcomere. | d. | myosin filament. | | | | |
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6.
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Repeating units of myosin and actin filaments bound by two Z lines
are a. | muscles. | c. | sarcomeres. | b. | myofibrils. | d. | extensors. | | | | |
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7.
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If
you want to increase the size and strength of your muscles, the best type of exercise
is a. | anaerobic. | c. | resistance. | b. | aerobic. | d. | None of the above | | | | |
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8.
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Skin
receives nutrients, eliminates wastes, and helps regulate body temperature by using which of the
following structures? a. | dermis | c. | hair follicle | b. | blood
vessels | d. | sensory
nerve | | | | |
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9.
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Keratin a. | is a waterproof protein. | c. | is a skin pigment. | b. | fills dead cells
in the dermis. | d. | All of the
above | | | | |
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10.
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Overexposure to sunlight may cause all of the following except a. | mutations in the
skin cells. | c. | acne. | b. | premature aging of the skin. | d. | skin cancer. | | | | |
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