Preganglionic axons of the ANS release
A. norepinephrine.
B. acetylcholine.
C. either acetylcholine or norepinephrine.
Answer: B
You might also like to view...
Select the correct statement about antigens
A) "Self-antigens" is another name for incomplete antigens. B) The largest type of antigen is called a hapten. C) One antigen may have many different antigenic determinants and may therefore cause the formation of more than one antibody. D) Only small antigens exhibit reactivity.
Vasoconstriction refers to a decrease in the radius of a vessel
Indicate whether the statement is true or false
After kicking a ball at a soccer match, Leticia feels excruciating pain at the back of her thigh. She has likely suffered an injury to which of the following?
A. The calcaneal tendon B. The thigh adductors C. The sciatic nerve D. The quadriceps femoris E. The hamstrings
As a result of an acute injury, the spleen has been ruptured and is bleeding out to the point that the stroke volume has decreased. To maintain cardiac output, heart rate will compensate by also decreasing to allow time for the ventricles to adequately fill with blood.
a. true b. false