When considering spatial summation of graded potentials, it is important to keep in mind
A) How far the potential may have traveled.
B) The initial amplitude of the potential.
C) The polarity of the potential.
D) All of the above
Answer: D
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Nicotinic receptors
A) respond to epinephrine. B) respond to norepinephrine. C) open chemically gated sodium ion channels. D) are found at neuroeffector junctions of the autonomic nervous system. E) open chemically gated calcium ion channels.
Some lymphocytes can survive as long as ________
A) days B) weeks C) months D) decades E) years
Sour taste receptors are stimulated by hydrogen ions of acidic food substances
Indicate whether the statement is true or false
How does an epiphysis contribute to the growth and function of a long bone?
A) It allows growth at the metaphysis while retaining the shape of the articular surface. B) It permits bones of different densities to occur in close proximity. C) It allows the bone to replace the cartilage at the metaphysis more rapidly. D) It permits more additional bone to be formed than would occur without it. E) None of the answers are correct.