Which of the following selectively stimulates a2 receptors in brain neurons, thereby suppressing sympathoadrenal activation and lowering blood pressure?
A. Clonidine
B. Acetylcholine
C. Atropine
D. Bradykinin
Answer: A
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Which of the following is/are function(s) of antagonist muscles?
A. control velocity of movement B. enhance stability of the joint C. both A and B D. none of the above
Bones that are longer than they are wide and generally have enlarged ends for articulations are classified as ________ bones.
A. irregular B. long C. flat D. short
The left border of the heart is formed by the
A) left atrium and right atrium. B) right atrium and right ventricle. C) left atrium and left ventricle. D) right ventricle and left ventricle. E) None of the answers is correct.
Identify structure "A" on the top diagram
A. autonomic ganglion B. somatic motor neuron C. effector organ (smooth muscle of GI tract) D. postganglionic neuron E. preganglionic neuron