John Smith works outdoors in the winter at a ski resort. His thyroid hormone levels are
A. lower in the winter to conserve body heat.
B. higher in the winter to increase body temperature.
C. lowered in the summer after his job to decrease body temperature.
D. increased in the summer after his job to increase body temperature.
E. unaffected by his job.
B
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Nerve impulses leading to the brain carry information about cool temperatures on the skin. The nerve fibers sending these signals will most likely belong to which division of the nervous system?
A) sensory (afferent) division B) somatic nervous system C) sympathetic division D) parasympathetic division
A muscle with the greatest number of tendons is a ________ muscle.
Fill in the blank(s) with the appropriate word(s).
The major site for processing information and integrating mental processes is the
A) ANS (parasympathetic division). B) ANS (sympathetic division). C) CNS. D) PNS. E) somatic motor nervous system.
What happens after a T cell has been activated for a specific antigen?
A. Produces antibodies B. Produces cytokines C. Undergoes clonal expansion D. Both produces cytokines and undergoes clonal expansion