Which of the following is not involved in muscle contraction?

1.An action potential that releases ACh at the neuromuscular junction.
2.An action potential that releases norepinephrine at the neuromuscular junction.
3.An action potential carried by T tubules.
4.Opening of voltage gated channels in the sarcoplasmic reticulum.


2

Biology & Microbiology

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As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are

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The three particle that make up atoms are

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The natural antacid that protects the intestines against stomach acid is produced by the __________.

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