The effects of tumor necrosis factor (TNF) in the body include which of the following?
a. stimulating granulocyte production
b. increasing T cell sensitivity to interleukins
c. slowing tumor growth and killing sensitive tumor cells
d. all of the listed responses are correct
Answer: d. all of the listed responses are correct
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How are osteons in compact bone tissue aligned?
a) horizontal to the metaphysis. b) parallel to the epiphysis. c) parallel to the length of the diaphysis. d) randomly between the epiphyseal plates. e) parallel to the perforating canals.
As compared to cooler regions, in the warmer regions of their habitats, reindeer are able to reduce body temperature more effectively by
A) Breathing through their nostrils. B) Increasing the rates of evaporative cooling from their ears. C) Switching to glycolysis in their brain stems. D) Panting and increasing the breathing frequency.
Whole muscle tension depends on all of the following except
a. number of muscle fibers contracting b. tension produced by each contracting fiber c. extent of motor-unit recruitment d. frequency of stimulation e. the proportion of each motor unit used at any given time
What do the olfactory, optic, and vestibulocochlear nerves have in common?
A. They are all associated with the sense of smell. B. They are all sensory nerves. C. They are all associated with the eye. D. They are all primarily motor nerves. E. They are all mixed nerves.