Parasympathetic fibers leave the brainstem as part of which four cranial nerves?
A) III, IV, V, and VI
B) III, V, VII, and IX
C) III, VII, IX, and X
D) V, VI, IX, and X
Ans: C) III, VII, IX, and X
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How is autocrine regulation best described?
A. Chemical regulators released by cells affect the functional status of different kinds of cells in the vicinity of the secretory cell. B. Chemical regulators are continuously released in constant amounts by the cell. C. Chemical regulators affect the same cells that produce them. D. Chemical regulators reach their site of action through a duct. E. Chemical regulators are released directly into blood vessels.
The palatine tonsils lie in the walls of the
A) nasopharynx. B) oropharynx. C) laryngopharynx. D) larynx. E) nasal cavity.
The resting neuron:
a. has a slight negative charge on the exterior b. has a slight positive charge on the exterior c. has an excess of sodium inside the cell d. both A and C above
________ molecules form the major component of the plasma membrane and are arranged in the form of a bilayer
A) Phospholipid B) Protein C) Sugar (carbohydrates) D) Cholesterol