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butalik [34]
2 years ago
8

1) What do u meant by photophone ?

Biology
2 answers:
Viefleur [7K]2 years ago
7 0

Answer:

June 3, 1880. You may know that a telephone uses electricity to send voice communications. However, you may not know that the man who invented the telephone, Alexander Graham Bell (1847-1922) had another invention that used light to transmit sound. He called it the photophone.

Explanation:

Debora [2.8K]2 years ago
3 0

jab Nye miljate hai tab purane boj lagne lagte hai !

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Answer:

"Action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern."

It is the mode through which a neuron transports electrical signals.

Explanation:

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A second action potential cannot occur until the membrane has recovered or reestablished, this is the refractory period. The absolute refractory period coincides with inactivation of voltage-gated sodium channels which makes it impossible to generate another nerve impulse.

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Explanation:

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Hence, the given statement is "false".

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it's right I took the test

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