Postganglionic sympathetic axons are carried from the sympathetic trunk to the spinal nerve by the
A. white rami communicantes.
B. superior cervical ganglion.
C. gray rami communicantes.
D. splanchnic nerves.
E. pterygopalatine ganglion.
C
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If two similar molecules can both combine with the same carrier, the presence of one of these molecules decreases the rate of entry of the other
Indicate whether the statement is true or false
Diffusion of a substance across the cell membrane is influenced by all of the following except
A) hydrolysis of ATP. B) the presence of the membrane channels. C) the charge of the substance. D) concentration gradient. E) lipid solubility.
Which organ belongs to more than one organ system?
A) Pancreas B) Larynx C) Stomach D) Urinary bladder
Which of the following phrases would apply to cardiac muscle cells?
A. are organized in parallel columns or bundles B. contain actin but no myosin C. develop a significant oxygen debt during systole D. are multinucleated like skeletal muscle cells E. possess special cell-to-cell contacts called intercalated discs