When voltage -gated Na+ channels of a resting neuron open,
A) the neuron depolarizes.
B) Na+ enters the neuron.
C) Na+ enters the neuron and the neuron depolarizes.
D) Na+ leaves the neuron.
E) Na+ leaves the neuron and the neuron depolarizes.
B) Na+ enters the neuron.
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Classifying joints as synarthrotic, amphiarthrotic, or diarthrotic represents
A. the degree of movement possible at the joint. B. the number of bones that the joint affects. C. location in the body. D. the composition of the joint.
Glucagon ___________.
A) stimulates gluconeogenesis and primarily targets skeletal muscle. B) stimulates gluconeogenesis and primarily targets the liver. C) only stimulates gluconeogenesis. D) primarily targets the liver. E) primarily targets skeletal muscle.
The chemical mediators, which stimulate the production of neutrophils, eosinophils, and basophils, cause fever, and increase T cell sensitivity, are termed
A) interleukins. B) interferons. C) tumor necrosis factors. D) phagocytic regulators. E) colony-stimulating factors.
Which muscle tissue type is controlled voluntarily?
A) cardiac and smooth B) skeletal C) cardiac D) smooth