Cholecystokinin, a hormone released from intestinal mucosa as a result of stimulation by the presence of fats in the small intestine, stimulates the gallbladder to contract and release bile into the duodenum.
Answer the following statement true (T) or false (F)
True
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Which of the following is true regarding the stretch-shortening cycle?
A. When a muscle is stretched just prior to contraction, the resulting contraction is more forceful. B. An eccentric contraction is followed by a concentric contraction. C. The SSC promotes storage of elastic energy. D. both A and B E. all of the above
Which of the following does not influence smooth muscle activity?
a. autonomic neurotransmitters b. mechanical stretch c. hormones d. alpha motor neurons e. local metabolites
A high local concentration of testosterone within the seminiferous tubules is essential for sustaining sperm production
Indicate whether the statement is true or false
Contractions of the dartos muscle ________
A) wrinkle the skin that covers the scrotum B) bring the testes closer to the body when body temperature increases C) result in the ejection of sperm from the penis D) draw the testes away from the body when temperature decreases