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tangare [24]
4 years ago
5

What is the difference between a cell wall and a cell membrane

Biology
1 answer:
aleksley [76]4 years ago
3 0
The cell wall<span> of a plant is generally made out of cellulose, a polysacchride (meaning it's made of a really really long chain of sugars). On the other hand, </span>cell membrane<span> (also known as </span>the plasma membrane<span>) is a semi-permeable </span>membrane<span> that is made of a phospholipid bi-layer.</span>
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When an action potential arrives at the axon terminal of a motor neuron, which ion channels open?
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Explanation:

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The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles  to release acetylcholine via exocytosis into the synaptic cleft.

I hope you find this information useful and interesting! Good luck!

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3 years ago
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