The physiological activities of the digestive system are not regulated by
A) hormones.
B) parasympathetic and sympathetic neurons.
C) the contents of the digestive tract.
D) intrinsic nerve plexuses.
E) the cerebral cortex
Answer: E
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The thermoneutral zone is
a. maintained by sweating and shivering mechanisms b. the temperature within the body core that remains constant despite changes in environmental temperature c. the environmental temperature range within which core temperature can be kept constant by skin vasomotor responses without calling supplementary heat-production or heat-loss mechanisms into play d. the controlled environment within a building equipped with both heating and air-conditioning e. the environmental temperature identical to core temperature so that body temperature is held constant without any physiological compensatory mechanisms being instituted
Fertilization is characterized by
a. a sperm's fertilin proteins binding to the follicle's integrin molecules b. a block to polyspermy c. multiple spermatozoa penetrating the ovum d. blastocyst formation e. both b and d
The building blocks that form the DNA double helix are called
A. nuclear pores. B. steroid bases. C. nucleotides. D. nitrogenous acids. E. nucleoli.
Ben had most of his stomach removed in an attempt for drastic weight loss. He is at the greatest risk for:
A) dehydration. B) pernicious anemia. C) gastroesophageal reflux disease (GERD). D) lactose intolerance.