Sweating and shivering are necessary adaptations because
A. all parts of the body must remain at normal body temperature to maintain life.
B. the health of vital organs requires a near-normal temperature, and metabolic rate fluctuates with changes in the environment.
C. to ensure that total metabolic rate remains constant, the body generates or releases heat as needed.
D. proteins rapidly denature when tissue temperature drops below 98.5?F.
B
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The function of microvilli, often seen on the apical membrane of transporting epithelia, is to
A) increase the toughness of the cell. B) increase the movement of extracellular fluid. C) increase the cell's surface area. D) increase the resistance of the cell to viruses. E) allow the cell to move through a fluid medium.
Compare concentric and eccentric contractions
A) Concentric contractions consist of equal lengths of time contracting and relaxing. Eccentric contractions consist of a longer time contracting than relaxing. B) Concentric contractions consist of equal lengths of time contracting and relaxing. Eccentric contractions consist of a longer time relaxing than contracting. C) Concentric contractions occur when the tension produced never exceeds the load, and the muscle does not change length. Eccentric contractions occur when the tension produced exceeds the load, and the muscle shortens. D) Concentric contractions occur when the muscle tension exceeds the load, and the muscle shortens. Eccentric contractions occur when the muscle tension is less than the load, and the muscle elongates. E) Concentric contractions occur when the muscle tension is less than the load, and the muscle elongates. Eccentric contractions occur when the muscle tension exceeds the load, and the muscle shortens.
In the optic ________ the visual fields of the axons are all ipsilateral.
Fill in the blank(s) with the appropriate word(s).
How does altitude affect blood composition and why? How would athletes' performance be affected if they live, train, and compete at different altitudes? Explain your answer, using different scenarios. Is such training a type of doping? Explain.
What will be an ideal response?