By what means of membrane transport does the neurotransmitter leave the axon ter

Question

By what means of membrane transport does the neurotransmitter leave the axon terminal? 3. How is the neurotransmitter removed from the symaptic clet? 4. An action potential is propagated along the of the muscle cell and down the into the cell 5. The result of this action potential releases what ion from the sarcoplasmic The Muscular System: Sliding Filament Theory a. The thick filament is composed of what molecule? b. Flexing the head of this molecule provides what is known as the The 1. 2. myosin head contains binding sites for what two molecules? a. b. 3. Three molecules make up the thin filament. a. Which molecule has a binding site for myosin heads? b. Which molecule covers this binding site? c. Which molecule has a binding site for calcium ions? What molecule must bind to the myosin head in order for it to disconnect with actin? 4. 5. Hydrolysis of the molecule in question 4 returns the myosin molecule to the conformation. 6. Name three roles for ATP in the contraction of muscle. a. b. c.

Explanation / Answer

2) exocytosis

3) acetylcholinestrase; degraded by specific enzymes like acetylcholinesterase degrade acetylcholine into acetyl group and choline

4) sarcolemma, T-tubules

5) calcium ions

1) a. Mtosin

b. Contraction.

2) ATP and actin

3) actin, tropomyosin, troponin

4) ATP

5) high energy

6) to energize the power stroke, to dissociate actin and myosin, for active transport of calcium ions into the sarcoplasmic reticulum

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