A single motor neuron with all the muscle cells it innervates is called a:
a. motor unit
b. neuromuscular junction
c. neurotransmitter
d. both B and C above
a. motor unit
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Chronic hypoxia
A) can be caused by anemia. B) increases 2,3-DPG production in blood. C) increases 2,3-DPG production in blood and can result from anemia. D) shifts the HbO 2 dissociation curve to the left. E) All of the answers are correct.
Which of the following secrete testosterone?
a. Secondary follicle b. Sertoli cells c. Seminal vesicles d. Leydig cells d. Interstitial endocrinocytes
Which is a physiological description rather than an anatomical one?
A. The muscles of the thigh are composed of skeletal muscle tissue. B. The walls of blood capillaries are composed of a thin epithelium. C. There are fenestrations (openings) in the epithelial cells of capillary walls. D. The muscles of the intestinal wall contract slowly and involuntarily. E. The esophageal wall includes a middle layer of dense irregular connective tissue.
The formation of organs and organ systems during the embryonic period is called ________.
Fill in the blank(s) with the appropriate word(s).