Characteristics of the Synapse and Neurotransmitters Use the diagram and describ

Question

Characteristics of the Synapse and Neurotransmitters Use the diagram and describe how each of the fac- In the animation, the neurotransmitter was recycled tors in the table below would affect the transmission back into the presynaptic neuron. In the the most common neurotransmitter is acetylcholine. Instead of being recycled, acetylcholine is brokenImpulse Interference Efect on the Muscle down by an enzyme called cholinesterase. synapses across the synapse to a muscle. Too much acetylcholine released Too little acetylcholine released Blockage of acetylcholine receptor

Explanation / Answer

Too much acetylcholine released: High contraction in the muscles; Although, cholinestrase is their to break the acetylcholine molecule, the excess release of acetylcholine will bind sufficiently with the cholinergic receptors on muscles and will cause contraction of muscle through ion channel opening. Cholinestrase enzyme causes reversal of contraction.

Too little acetylcholine released: Too little acetylcholine will cause too less contraction and quick reversal will occur due to cholinestrase.

Blockage of acetylcholine receptors: Blockage of acetylcholine receptors will not cause any contraction regardless of release of acetylcholine because contraction occurs only after binding of acetylcholine with their receptors.

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