A tennis player goes to the doctor and is told he has a torn rotator cuff. He has injured his
A. neck.
B. shoulder.
C. hip.
D. knee.
E. elbow.
B
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Circular folds and intestinal villi
A) increase the surface area of the mucosa of the small intestine. B) carry products of digestion that will not pass through the walls of blood capillaries. C) produce new cells for the mucosa of the small intestine. D) secrete digestive enzymes. E) produce hormones.
The production of sperm and egg cells is called __________.
Fill in the blank(s) with the appropriate word(s).
Identify the mechanisms by which neuromodulators alter synaptic transmission
What will be an ideal response?
Which of the following statements is FALSE?
A. Ca2+ that activates contraction of smooth muscles can come from either the ECF or from the sarcoplasmic reticulum. B. In the absence of any neural input, skeletal muscle cannot generate tension. C. A single smooth muscle cell may be innervated by both a sympathetic neuron and a parasympathetic neuron. D. Synaptic input onto skeletal muscle cells is always excitatory, whereas inputs to smooth muscle cells may be either excitatory or inhibitory. E. Contractile activity of smooth muscle cells does not normally require Ca2+.