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Hunter-Best [27]
3 years ago
11

Organelo que regula el equilibrio hídrico en protistos de agua dulce.

Biology
1 answer:
yKpoI14uk [10]3 years ago
7 0

Answer:

These organelles are contractile vacuoles

Explanation:

Contractile vacuoles are intercellular pumps that are slowly filled with fresh water and eventually expel their contents outside the cell. Freshwater protists maintain the hydric equilibrium by contractile vacuoles that pump out the water of the cell and thus prevent the cell swelling induced by osmotic stress.

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Answer: True

Explanation:

<u>A cell membrane consists of a lipid bilayer made of polar phosphate head and a nonpolar lipid tail.</u> It is semipermeable and regulates the transport of materials through it. For this,<u> it is selectively permeable</u> and since it is made of lipids, hydrophobic and small polar molecules can diffuse easily through it by simple diffusion and down their concentration gradient. However, polar molecules, large molecules (such as glucose) and ions are not able to pass through it because they are repelled.

To accomplish the transport of these molecules that can not diffuse, proteins embebbed in the membrane function as carriers that enable the transport of polar molecules, large molecules and ions by passive (through facilitated diffusion, down its concentration gradient) or active transport (movement against its concentration gradient).

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3 years ago
Which<br> of the following could be considered a reliable source of scientific<br> information?
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The answer is C. A textbook
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2 years ago
Which term refers to the different levels on a energy pyramid
earnstyle [38]

Answer:

trophic level

Explanation:

Each step of the food chain in the energy pyramid is called a trophic level.

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3 years ago
1. What happens to the cell membrane during endocytosis?
Yanka [14]

Answer:

The cell membrane will fold over a substance or particle until it becomes completely enclosed by the membrane

Explanation:

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B

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