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givi [52]
4 years ago
13

Acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium channel and opens it. Th

is is an example of _____.
Biology
1 answer:
NNADVOKAT [17]4 years ago
7 0

Answer:

Neurotransmission

Explanation:

Acetylcholine is an excitatory neurotransmitter that can act on both neuronal synapses and motor plates that send signals to the muscles.

Neurotransmitters are like chemical "messengers" that carry, stimulate and balance signals between neurons and other cells in the body.

Acting on a neuron, acetylcholine opens the cell's sodium and potassium channels, causing the concentrations of these two ions inside and outside the cell to stabilize, depolarizing the membrane.

This depolarization will extend through the neuron and give rise to the nerve impulse.  In motor plates (from neuron to muscle), receptors in muscle fibers recognize acetylcholine as a sign for muscle contraction.

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Name the structure that increases the surface area of the small intestine in humans.
lutik1710 [3]

The name of the structure that increases the surface area of the small intestine in humans is Villi.

<h3>What are the functions of the small intestine?</h3>

The small intestine performs a key role in the digestion of undigested food which comes through the stomach. It also absorbs all the essential minerals and nutrients from the food and is used by the body.

Villi or microvilli is the structure that increases the surface area of the small intestine for food absorption and adding digestive secretions.

Therefore, the name of the structure that increases the surface area of the small intestine in humans is Villi.

To learn more about the Small intestine, refer to the link:

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Romashka-Z-Leto [24]
I believe the correct answer to this question is B.

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I hope this is correct and helps you!
4 0
3 years ago
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Sophie [7]

Answer:

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