Immediately after engagement of NK-cell Toll-like receptors, the NK cell _____
a. discharges cytotoxic granules
b. ligates IL-12Reta1 and IL-12Reta 2
c. synthesizes and secretes IL-15
d. synthesizes and secretes IL-12
e. synthesizes and secretes type I interferons.
B
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Which of these factors would be considered an interpersonal factor affecting physical activity behavior?
A. Access to parks and recreation centers B. Participation in physical education classes at school C. Cognitive or physical disability D. Social support from friends or family
The more muscle fibers a motor neuron supplies with nerves, the ____.
A. more precise the muscle contraction B. stronger the muscle contraction C. more refined the muscle contraction D. weaker the muscle contraction E. the less risky the muscle contraction
In general, the lower the intensity of activity, the longer the duration of exercise should be
Indicate whether the statement is true or false.
The motor cortex is concerned with voluntary movement and is located within the
A. hypothalamus. B. cerebrum. C. brain stem. D. cerebellum.