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Generally,the larger an animal,the less of its weight is made up by its skeleton.

A) True
B) False

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Running times in the 100-meter dash have decreased due to


A) a decrease in illegal drug use.
B) better corporate sponsors.
C) use of equipment that reduces drag.
D) use of equipment that increases drag.

E) C) and D)
F) A) and B)

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Hemoglobin allows slow muscle fibers to continue cellular respiration even when blood levels of oxygen are low.

A) True
B) False

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Lobsters and insects have internal skeletons.

A) True
B) False

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Which of the following would NOT be found in an insect?


A) a neuromuscular junction
B) a sarcomere
C) marrow
D) chitin

E) A) and C)
F) C) and D)

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Specialized bone cells,called ________,are surrounded by calcium and phosphate compounds.

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Weight training initially increases the strength of a muscle by increasing the ________ of muscle fibers.

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A hydrostat stiffens when a muscle contracts around a body cavity filled with a ________.

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If there were no tendons in your appendicular skeleton,you would NOT be able to


A) walk.
B) nod your head.
C) speak.
D) chew your food.

E) A) and B)
F) A) and C)

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Which of the following is part of the appendicular skeleton?


A) the spinal column
B) the arm
C) the skull
D) the rib cage

E) A) and D)
F) A) and C)

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By the time a human is born,its skeleton has been completely replaced with bone.

A) True
B) False

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Cardiac muscles branch to interconnect with other cardiac cells to create a coordinated heartbeat.

A) True
B) False

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Ligaments are connective tissues that connect ________ to bone.

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Skeletons that form hard mineral matrices usually contain


A) actin.
B) cartilage.
C) calcium.
D) chitin.

E) None of the above
F) All of the above

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Flying and swimming animals share the features of streamlined bodies to reduce drag and appendages with ________ surfaces to efficiently push against air or water.

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Which of the following statements about bone tissue is FALSE?


A) It contains living cells.
B) It has a mineral matrix composed largely of calcium and phosphate.
C) It supports the ear lobes.
D) It is structurally strong yet not brittle.

E) None of the above
F) All of the above

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The energy source for muscle contraction comes from


A) actin.
B) myosin.
C) ATP.
D) calcium ions.

E) B) and D)
F) B) and C)

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