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Arada [10]
3 years ago
6

Plz answer I need help​

Biology
1 answer:
Bogdan [553]3 years ago
3 0
1.Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills either on side of the pharynx.

2.Gills are branching organs located on the side of fish heads that have many, many small blood vessels called capillaries.

3.The colour is red

4. A Gill filaments project from each arc between the dorsal upper and ventral lower surfaces of the filaments.
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Answer:

For this receptor, the stimulus begins with an explosion of action potentials.

that would be the correct option.

Explanation:

A tonic receptor is one that is activated when the action potentials were maintained over time and during the signaling of the receptor.

Tone receptors require continuous stimulation over a period of time to trigger a response and deliver it to the central nervous system.

It keeps the nervous system constantly active in the environment that surrounds it.

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