A somatic motor neuron carries signals to which of the following?
A. The viscera of the thoracic and abdominal cavities
B. The CNS
C. Glands, cardiac muscle, and smooth muscle
D. Voluntary contraction of smooth muscle
E. Skeletal muscle fibers
Answer: E
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Select the correct statement about renal mechanisms of acid-base balance.
A) The kidneys are not able to excrete phosphoric acid. B) Excreted hydrogen ions are unbound in the filtrate. C) Kidney tubule cells are able to synthesize bicarbonate ion. D) The kidneys are the most important mechanism for eliminating all bicarbonate ions.
Part of the support network surrounding developing sperm cells are nourishing cells called
A) interstitial cells. B) nurse cells. C) seminiferous cells. D) spermatogonia. E) spermatozoa.
Which of the following statements about light detection is TRUE?
a. Light detection is synonymous with vision. b. Light detection is always initiated in a rod or cone photoreceptor, though these need not be located in an eye. c. Even in its most primitive form, light detection evolved in structures dedicated to this purpose. d. Light detection evolved numerous times in a variety of structures. e. None of these.
Which statement is most useful in explaining why chemists assign atoms to chemical elements by counting protons?
What will be an ideal response?