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iogann1982 [59]
3 years ago
5

How do large molecules move across the plasma membrane

Biology
2 answers:
Elodia [21]3 years ago
7 0

Answer:

The plasma membrane is selectively permeable

Explanation:

hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

Ksju [112]3 years ago
3 0

Answer:

By passive or active transport

Explanation:

Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

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Higher Photosynthesis, lower carbondioxide concentration in the atmosphere and vice versa.

Explanation:

Photosynthesis is greatly responsible for the fluctuation of carbondioxide concentration in the atmosphere because photosynthesis is the process where carbondioxide gas is used in large amount. If the vegetation occurs higher in the season, decrease will occur in the carbondioxide concentration of the atmosphere while on the other hand, if the less vegetation occur then there is higher amount of carbondioxide concentration in the atmosphere.

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See the answer below

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Increasing the number of capillaries associated with alveoli would be expected to?
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Increasing the number of capillaries associated with alveoli would be expected to increase carbon dioxide being carried to alveoli.

Alveoli are the very small air sacs at the end of the bronchioles. Each alveolus is cup-shaped with thin walls, and It is surrounded by networks of blood vessels which are called as capillaries that also have very thin walls. The oxygen we breathe gets into the blood through the alveoli and capillaries. The Red blood cells travel through the capillaries. Alveoli's walls share a membrane with the capillaries. Oxygen and carbon dioxide get in and move freely between the human respiratory system and the bloodstream.

Oxygen molecules are attached to red blood cells, which travel back to the heart, and at the same time, carbon dioxide molecules in the alveoli get out of the body.

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