Arsenic poisoning harms the body by
A) unraveling the DNA double helix.
B) rotting the teeth.
C) forming more sulfur bonds in proteins.
D) interfering with cellular extraction of energy from glucose.
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Question 2) Ceroid pigments and lipofuscin accumulate with aging, impairing a cell's ability to
withstand the damaging effects of oxygen free radicals.
Indicate whether the statement is true or false
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Question 3) Masses of myelinated nerve fibers appear
A) white. B) gray. C) transparent. D) brown.
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Question 4) A base is an electrolyte that releases ions that combine with hydrogen ions.
Indicate whether the statement is true or false
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Question 5) The number of bones in the skeletal system is
A) the same for everyone. B) more for males than females.
C) variable. D) more for females than males.
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Question 6) Which of the following is a normal response to excessive loss of body heat in a cold
environment?
A) Dermal blood vessels dilate. B) Dermal blood vessels constrict.
C) Smooth muscles relax. D) Sweat glands become active.
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Question 7) In the DNA damage response,
A) repair enzymes replace mismatched nucleotides in DNA.
B) repair enzymes replace mismatched nucleotides in RNA.
C) more than one codon encodes one type of amino acid.
D) repair enzymes replace mismatched amino acids in protein.
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Question 8) Chromosomes get longer as a cell ages.
Indicate whether the statement is true or false
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Question 9) Fibrocartilage discs that divide the joint into two compartments are called
A) tendons. B) ligaments. C) bursae. D) menisci.
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Question 10) Bones
A) do not contribute to homeostasis.
B) are not living tissue.
C) have a matrix composed mostly of organic salts.
D) are multifunctional.
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