The muscle cell's electrical response is turned off by an enzyme in the motor end-plate membrane, acetylcholinesterase (AChE), which inactivates ACh
a. True
b. False
Indicate whether the statement is true or false
True
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Salt is placed in a glass of water. Slowly the salt begins to even out in concentration due to what factor?
A. Concentration gradient B. Concentration vector C. Distance gradient D. Distance vector
What would occur if ACh was not removed from the nicotinic receptors on skeletal muscle cells?
a. the cell would relax. b. the cell would repolarize with the opening of chloride channels. c. the cell would remain contracted until fatigued. d. sodium would continue to move into the cell causing excitation. e. both (c) and (d) above.
What structure functions to keep the retina in place and helps to maintain eyeball shape?
What will be an ideal response?What will be an ideal response?
The embryonic disk is initially composed of ________.
A. epiblast and hypoblast B. epiblast and yolk sac C. ectoderm and hypoblast D. hypoblast and yolk sac E. epiblast and mesoderm