Norepinephrine and epinephrine are considered to be ________ when released into the bloodstream, but ________ when released at synapses
A) hormones; neurotransmitters
B) neuropeptides; neurotransmitters
C) neurotransmitters; hormones
D) neurotransmitters; neuropeptides
E) neuropeptides; neurohormones
Answer: A
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The number of pairs of true ribs is ________
A) 7 B) 14 C) 12 D) 5
Under which condition would the release of neurotransmitter by photoreceptors be greatest?
A) under normal room light B) in a pitch-black room after 30 minutes C) immediately after going outside in bright sunlight D) focusing intently on a close object E) focusing intently on a distant object
Which of the following does not occur when smooth muscle contracts?
a. Walls of blood vessels help maintain blood pressure. b. Food moves through the digestive tract. c. Bones of the skeletal system move. d. All of the above occur when smooth muscle contracts.
The group of capillaries that forms the renal corpuscle is called the___
Fill in the blank(s) with correct word