Imagine if no ATP was available. Predict the consequences of this on skeletal muscle contraction and relaxation.
A. Ca2+ would be unable to leave the sarcoplasmic reticulum upon depolarization of the sarcolemma.
B. Cross bridges would remain attached after muscle contraction.
C. The active sites on actin would never be exposed.
D. All of the choices are correct.
Answer: B
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After kicking a ball at a soccer match, Leticia feels excruciating pain at the back of her thigh. She has likely suffered an injury to which of the following?
A. The sciatic nerve B. The quadriceps femoris C. The thigh adductors D. The hamstrings E. The calcaneal tendon
Most muscle-lever systems work at a mechanical disadvantage
Indicate whether the statement is true or false
Cells that support neurons are ________.
Fill in the blank(s) with the appropriate word(s).
The sense of touch can be considered a ________.
A. general sense B. special sense C. chemoreceptor D. visceral sense