Sunlight, ultraviolet light, and X rays all darken skin because they increase blood flow to
the dermis.
Indicate whether the statement is true or false
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Question 2) Drugs that increase the actions of norepinephrine and/or serotonin by keeping them in
synapses longer are most likely used to treat
A) multiple sclerosis. B) Tay-Sachs disease.
C) erectile dysfunction. D) clinical depression.
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Question 3) In a push-up, the elbow joint flexes as the person lowers.
Indicate whether the statement is true or false
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Question 4) Three types of RNA participate in protein synthesis.
Indicate whether the statement is true or false
(
Question 5) Transcription yields protein and translation produces RNA.
Indicate whether the statement is true or false
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Question 6) Oxygen debt in muscles may develop because of
A) too much oxygen used in forming pyruvic acid when skeletal muscles are contracted
strenuously for a minute or two.
B) the inability of myoglobin molecules to store enough oxygen when skeletal muscles
are used strenuously for a minute or two.
C) too high a concentration of oxygen in the atmosphere.
D) the inability of respiratory and circulatory systems to supply enough oxygen to
skeletal muscles when used strenuously for a minute or two.
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Question 7) A saddle joint forms between bones whose articulating surfaces have both convex and
concave regions.
Indicate whether the statement is true or false
(
Question 8) Another name for pain receptors is
A) tactile corpuscles. B) mechanoreceptors.
C) lamellated corpuscles. D) nociceptors.
(
Question 9) Neurotransmitters that are modified amino acids are
A) aspartic acid, glutamic acid, glycine, and GABA.
B) dopamine, serotonin, epinephrine, and norepinephrine.
C) enkephalins, endorphins, and substance P.
D) potassium, sodium, and calcium ions
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Question 10) The dermis is very flat compared to the epidermis, which has ridges projecting inward
and elevations called papillae.
Indicate whether the statement is true or false
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