Which of the following is NOT a change associated with aging?
A. loss of neurons
B. loss of skeletal and cardiac muscle tissue
C. decreased cross-linking of collagen
D. decreased ability of the lens in the eye to accommodate
E. arteriosclerosis
C
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John Smith works outdoors in the winter at a ski resort. His thyroid hormone levels are
A. higher in the winter to increase body temperature. B. increased in the summer after his job to increase body temperature. C. lower in the winter to conserve body heat. D. unaffected by his job. E. lowered in the summer after his job to decrease body temperature.
Sally has a tumor. In an effort to fight the cancerous cells her body increases the production of
A) neutrophils. B) NK cells. C) suppressor T cells. D) memory B cells. E) plasma cells.
If you were able to sort nucleotides into DNA nucleotides and RNA nucleotides, which component of the nucleotide would you use to do so?
A. Pentose sugar B. Nitrogenous bases C. Phosphate group
The two divisions of the autonomic nervous system
A. use preganglionic and postganglionic neurons to innervate skeletal muscle.
B. contain autonomic ganglia to house ganglionic neurons.
C. are voluntary.
D. are composed of PNS structures only.
E. function only during sleep.