The vessel that supplies blood to the face is the
A) internal carotid artery.
B) external carotid artery.
C) basilar artery.
D) anterior cerebral artery.
E) middle cerebral artery.
B) external carotid artery.
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Tom's father suffers a stroke that leaves him partially paralyzed on his right side. What type of glial cell would you expect to find in increased numbers in the damaged area of the brain that is affected by the stroke?
A) astrocytes B) oligodendrocytes C) Schwann cells D) microglia
The negative charge established along a nerve cell membrane is due to
a. movement of Na+ into the cell. b. movement of proteins out of the cell. c. higher permeability of K+ relative to Na+. d. intracellular protein anions. e. both (c) and (d).
The most numerous white blood cells in peripheral circulation are the
A) neutrophils. B) eosinophils. C) basophils. D) lymphocytes. E) monocytes.
A person who has difficulty swallowing is diagnosed as having esophageal achalasia, a condition that involves the ANS. What division and action would you expect to be the cause of this problem?
A) defects in both sympathetic and parasympathetic responses, causing esophageal spasms B) sympathetic, which causes too-rapid peristaltic movement of the esophagus C) a defect in the sympathetic swallowing center that coordinates esophageal contraction D) parasympathetic, which causes excessive and irregular esophageal contraction E) None of the answers are correct.