A cheetah is chasing a gazelle. What division of the vertebrate nervous system is regulating the stress response in both animals?
The PNS comprises the somatic (voluntary) and autonomic (involuntary) nervous systems. The sympathetic division of the autonomic nervous system activates the body for fight-or-flight responses. The parasympathetic division generally promotes relaxation and digestion (or "rest and digest").
A. somatic nervous system
B. parasympathetic nervous system
C. sympathetic nervous system
D. parasymbiotic nervous system
E. cerebral cortex
C. sympathetic nervous system
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A defect in the HoxA-3 would most likely result in
A. defects of the thyroid. B. defects of the limbs. C. an enlarged heart. D. defects of the lungs. E. abnormal positioning of the kidneys.
Marine mammals, because of the energy demands of being homeothermic, expend about ____ times as much energy as other marine organisms
a. 5 b. 10 c. 15 d. 20 e. 25
Giardiasis involves
A. vector transmission. B. symptoms of abdominal pain, flatulence, and diarrhea. C. a protozoan that does not form cysts. D. infection of the large intestine. E. All of the choices are correct.
A microaerophile
A. needs normal atmospheric levels of oxygen. B. requires a small amount of oxygen but won't grow at normal atmospheric levels of oxygen. C. grows best in an anaerobic jar. D. grows with or without oxygen.