Question

Which of the following statements describe situations of passive transport across a cell membrane? (Choose all that apply)
-A cell uses energy to move molecules across a membrane from an area of lower concentration to an area of higher concentration.
-Water is moved across a membrane to dilute a molecule that is highly concentrated on the other side.
-A cell removes specific molecules through a membrane based on size.
-A molecule disperses to create a uniform concentration throughout a solution

Answer 1

Answer: molecule disperses to create a uniform concentration throughout a solution

Answer 2

The statements that describe situations of passive transport across a cell membrane are:

B. Water is moved across a membrane to dilute a molecule that is highly concentrated on the other side.

C. A cell removes specific molecules through a membrane based on size.

Cell transport refers to the movement of ions, molecules, or substances across the cell membrane, either into or out of the cell of a living organism.

Basically, the two (2) main types of cell transport are:

• Active transport.

• Passive transport.

Passive transport involves the movement of substances across the cell membrane without the use or expenditure of chemical energy.

Generally, passive transport is highly dependent on the second law of thermodynamics for the movement of chemical substances across a cell membrane.

The characteristics of passive transport include the following:

• Water is moved across a membrane to dilute a molecule that is highly concentrated on the other side.

• A cell removes specific molecules through a membrane based on size.

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