A stroke is a
a. cerebrovascular accident.
b. glucose deficiency.
c. loss of the myelin sheath.
d. neurotransmitter deficiency.
e. uncontrolled firing of neurons.
A
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During an afternoon class, Lisa starts to feel hungry and worries that her blood sugar level may be dropping. Which hormone is helping to prevent a drop in blood sugar level?
A) thyroxine B) glucagon C) insulin D) aldosterone
Nodes of Ranvier are found only on
A. unmyelinated axons. B. astrocytes. C. myelinated axons. D. dendrites. E. Nissl bodies.
The oxygen content of arteries in the pulmonary circulation is high.
Answer the following statement true (T) or false (F)
White blood cells engulf bacteria by means of ________.
A. active transport B. cotransport C. phagocytosis D. pinocytosis E. receptor-mediated endocytosis