Extensibility refers to the ability of a muscle to stretch
Indicate whether the statement is true or false
TRUE
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Which of the following structures propagates action potentials from the surface of a muscle fiber to its interior?
A. The sarcomeres B. The sarcoplasmic reticulum C. The endomysium D. The myofibrils E. The T tubules
Vigorous physical activity causes total metabolic rate to
A. increase for the duration of the exercise. B. increase during the exercise and for hours afterwards. C. remain constant. D. decrease to conserve energy during the exercise but increase to repay oxygen debt. E. decrease during the exercise and for hours afterwards.
Which of the following contains sodium?
A) H2O B) NaCl C) N2 D) CH4 E) H2SO4
The embryonic structure that gives rise to the structures of the central nervous system is called the ________.
A. forebrain B. neural plate C. brainstem D. notochord