The types of neurons that are organized into neuronal pools are
A) intraneurons. B) interneurons.
C) Schwann cells. D) astrocytes.
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Question 2) All reflexes
A) have a reflex arc. B) occur in the spinal cord.
C) have interneurons. D) have association neurons.
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Question 3) Pain receptors differ from other somatic receptors by
A) being stimulated only when pain comes from skeletal muscle.
B) adapting very little, if at all.
C) adapting much more than other receptors.
D) not being able to project impulses back to their origin.
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Question 4) Skeletal muscles help maintain body temperature in that
A) excess myosin is quickly metabolized to yield heat.
B) they conserve actin and myosin in cold weather.
C) the more active they are, the more heat is released.
D) the more active they are, the more heat is used up.
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Question 5) Melanin production is greater in the skin of people who live outdoors all the time than in
people who do not.
Indicate whether the statement is true or false
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Question 6) Circulation is vital because it
A) delivers carbon dioxide to tissues and removes excess oxygen.
B) supplies oxygen and nutrients to and removes wastes from tissues.
C) inflates the lungs.
D) delivers wastes to tissues.
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Question 7) Steroid hormones
A) all of the above.
B) combine with protein receptor molecules.
C) cause messenger RNA synthesis.
D) are soluble in lipids.
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Question 8) The thyroid gland secretes growth hormone.
Indicate whether the statement is true or false
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Question 9) All cell types divide at the same rate.
Indicate whether the statement is true or false
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Question 10) During muscle contraction ATP supplies energy for
A) creatine phosphate synthesis. B) enzyme activity.
C) glycogen synthesis. D) myofilament movement.
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