The axon ________.
A. carries action potentials toward the sensory receptors
B. carries action potentials away from the cell body
C. carries action potentials toward the cell body
D. nourishes and protects the neuron
Answer: B
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Changes in environmental pH or temperature will cause the reaction rate for an enzyme to
A) increase. B) decrease. C) either increase or decrease depending upon enzyme properties. D) not change.
Antigen-presenting cells are ________________, and they display antigens to both ________________ and ______________
60. A. immune cells; B-lymphocytes; T-lymphocytes B. immune cells; helper T-lymphocytes; cytotoxic T-lymphocytes C. any nucleated cell; B-lymphocytes; T-lymphocytes D. any anucleate cell; helper T-lymphocytes; cytotoxic T-lymphocytes E. any blood cell; helper B-lymphocytes; cytotoxic B-lymphocytes
The ridges in the cerebrum are called:
a. sulci b. gyri c. corpus callosum d. cerebral nuclei
Colon cancer is the #3 cancer killer. Whether you are a man or a woman, current guidelines urge you to have a colonoscopy screening when you reach age 50 because
A) colon cancer is the #3 cancer killer, behind breast and lung cancer for women, so you could die if you don't get screened. B) colon cancer is the #3 cancer killer, behind prostate and lung cancer for men, so you could die if you don't get screened. C) colon cancer is treatable with surgery if caught in time with a colonoscopy, but you could die if you don't get screened. D) early colon cancer often has no symptoms, which is why screening is so important, so you could die if you don't get screened. E) all of the answers are correct, and you could die if you don't have a screening colonoscopy when you reach age 50.