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katovenus [111]
4 years ago
7

Explain why some substances are able to pass through the cell membrane

Biology
2 answers:
VashaNatasha [74]4 years ago
6 0
The most important property of the cell membrane<span> is its selective permeability: </span>some substances<span> can </span>pass through<span> it freely, but others cannot. Small and nonpolar (hydrophobic) molecules can freely </span>pass through<span> the </span>membrane<span>, but charged ions and large molecules such as proteins and sugars are barred passage. </span>
slega [8]4 years ago
4 0
Selective permanently, is the reason why the cell membrane only let's certain things pass through. small noon polar molecules (oxygen & carbon dioxide) pass through by simply diffusing. But other molecules use other types of passive transport or active transport.
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yuradex [85]

Answer: It helps to regulate circadian rhythm

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During day light, the secretion of melatonin or sleep hormone is suppress by melanopsin that keeps people awake and alert. Nevertheless, during nighttime, melanopsin stimulates the release of melatonin to signal sleeping time. Therefore, this hormone works the entire day and has direct effect on the circadian rhythm, which acts as a regulator of our biological clock.

 

 


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3 years ago
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4 years ago
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Answer:

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Explanation:

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4 0
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