Premotor and supplementary motor areas, with input from the ____________________, plan the ____________________ motor command that is issued to the appropriate motor neurons by the primary motor cortex through a descending system
Fill in the blank(s) with correct word
cerebrocerebellum; voluntary
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Which of the following statements concerning hair is true?
A. At puberty, much of the vellus hair is replaced with terminal hair. B. Hair in the axillary region is vellus hair after puberty. C. In males, the hairs of the beard are vellus hairs. D. Both vellus and terminal hairs are pigmented. E. The majority of hair on the chest is vellus hair.
Functions of the spleen include ________
A) production of thymosins B) purification of lymph C) production of thymosins, initiation of immune responses, and purification of lymph D) phagocytosis of damaged red blood cells, initiation of immune responses, and iron storage
Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels
A. substance P B. dopamine C. GABA D. nitric oxide (NO)
Enkephalins produce presynaptic inhibition in neurons transmitting pain signals. Increased levels of enkephalins will
A. increase awareness of pain. B. decrease awareness of pain. C. increase amount of pain. D. decrease amount of pain. E. have no effect on awareness or amount of pain.