Discuss the function of a motor unit in a muscle contraction
What will be an ideal response?
Muscle contraction is regulated by signals coming from motor nerves. Motor nerves originate in the spinal cord and
send nerve fibers to individual muscles throughout the body. The motor nerve and all the muscle fibers it controls is
called a motor unit.
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Emily has brittle fingernails that crack and split easily. Emily's mother advises her daughter to take gelatin pills 3 times/day, because she has heard the practice strengthens fingernails. The mother's nutrition-related advice about the benefit of taking gelatin pills is an example of a(n)
A. anecdote. B. placebo. C. hypothesis. D. testimonial.
Which of the following is not a weight-loss strategy that will promote maintenance of weight loss?
A) A diet that follows the latest dieting trends or fad diet. B) A nutrient-dense diet accompanied by daily physical activity. C) A reduced-calorie, nutritionally adequate diet. D) A diet that requires regular eating patterns, including breakfast.
It takes about _____ pound(s) of grapes to produce 1 pound of raisins
a. 1 b. 2 c. 3 d. 5 e. 7
Almost all (99%) of the calcium in the body is used to
a. provide energy for cells. b. provide rigidity for the bones and teeth. c. regulate the transmission of nerve impulses. d. maintain the blood level of calcium within very narrow limits. e. maintain muscle health and function.