After leaving the thoracic cavity and passing over the outer border of the first rib, the subclavian artery becomes the
A) radial artery.
B) brachial artery.
C) clavicular artery.
D) axillary artery.
E) ulnar artery.
D) axillary artery.
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Heart valves close when their tissue is depolarized
Indicate whether the statement is true or false.
Squid benefit from having axons of multiple sizes that innervate their muscle fibers in the mantle because
A) Squid need larger diameter axons to innervate larger groups of fibers. B) The larger diameter axons innervate fibers that are farther away because the signals are conducted more rapidly through them. C) Smaller fibers are not energetically efficient. D) Larger fibers generate larger action potentials, which allows for more neurotransmitter release.
Identify the internal auditory canal
a) C b) D c) E d) F e) H
Sympathetic preganglionic axons
A. can synapse in terminal ganglia. B. must synapse in parasympathetic ganglia. C. can synapse with cells in the adrenal cortex. D. can synapse in the dorsal root ganglion. E. can synapse in either chain or collateral ganglia.