The sympathetic nervous system
a. releases NE from most of its preganglionic neurons
b. has some postganglionic fibers that release acetylcholine
c. has preganglionic neurons that originate in the thoracic and lumbar regions of the spinal cord
d. has characteristics a and b
e. has characteristics b and c
E
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What will be an ideal response?
He type of transport that requires energy input is called ____
a. passive transport b. diffusion c. osmosis d. active transport
B cells that differentiate during an initial immune response but remain dormant until being activated during a subsequent exposure to an antigen are called:
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Answer the following statement true (T) or false (F)