The most common molecule in the human body is made of what elements?

Biology

1 answer:

Orlov [11]3 years ago

4 0

Oxygen. Sorry for a 2 year old late response

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Why is homogeneous mixture not considered a pure substance

Lera25 [3.4K]

A homogeneous mixture is not considered a pure substance because it can be separated through mechanical and thermal processes. A pure substance, however, cannot be separated.<span>

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5 0

3 years ago

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An inhibitory stimulus has occurred. B. Chemically gated potassium channels have opened. C. Excessive potassium has diffused out

andrezito [222]

Given question is incomplete. Complete question has been attached.

Answer:

C. Excessive potassium has diffused out causing hyperpolarization.

Explanation:

The nerve action potential can be divided into following stages:

Stimulus is detected by the cell in resting stage.
Sodium channels in the membrane open from where influx of sodium ions occur which is called depolarization
After a while, sodium channels close and potassium channels open from where efflux of potassium ions occur which is called repolarization.
The membrane potential further lowers due to continous efflux of potassium ions which is called hyperpolarization.
After a while potassium channels close and membrane returns to its resting stage.

In the given figure, stage 4 depicts hyperpolarization because the membrane potential has dropped to the lowest point below -70mV. Hence, option C is correct.