Alveolar ducts are also called ____
a. lobules
b. ventricles
c. atria
d. alveolar sacs
c
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The complement system
a. consists of plasma proteins produced by the liver that circulate in the blood in inactive form b. is the primary mechanism activated by antibodies to kill foreign cells c. can be activated by antibodies and/or antigens d. is considered a nonspecific defense e. has all of the above characteristics
What aspect of evolution does a phylogenetic classification represent more clearly than a Linnaean classification does?
What will be an ideal response?
Functions of astrocytes include all of the following except
A) maintaining the blood-brain barrier. B) conducting action potentials. C) guiding neuron development. D) responding to neural tissue damage. E) forming a three-dimensional framework for the CNS.
Cholinergic fibers use ________ as the neurotransmitter.
A. dopamine B. serotonin C. norepinephrine D. acetylcholine