What is the definition of a "motor unit"?
A. a single motor neuron plus all the muscle fibers it innervates
B. a single muscle fiber plus all of the motor neurons that innervate it
C. all of the motor neurons supplying a single muscle
D. a pair of antagonistic muscles
E. all of the muscles that affect the movement of any given joint
A
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Which of the following stimulates gallbladder contraction?
a. CCK b. secretin c. sympathetic stimulation d. a and b e. a and c
Match the hormone with its appropriate function.A. Stimulates synthesis of thyroid hormonesB. Increases adrenal cortex secretionsC. Development of immune systemD. Milk productionE. Decreases blood Ca2+ levelsTSH
Fill in the blank(s) with the appropriate word(s).
Spermatogonia divide by what process?
A. Mitosis B. Meiosis C. Both answers are correct. D. None of these are correct.
What structure separates the renal pyramids?
A) Renal column B) Hilum C) Renal capsule D) Renal pelvis