Question

Distinguish between passive diffusion, facilitated diffusion, and active transport of nutrients in the following examples by classifying the examples into the correct category.

a. Glucose transport through a channel protein (Facilitated diffusion)
b. Oxygen diffusion across the cell membrane (Passive diffusion)
c. Sodium-potassium pump in a cell membrane (Active transport)
d. All of the above

Answer 1

Passive diffusion, facilitated diffusion, and active transport are different mechanisms that cells use to transport nutrients across the cell membrane.

Step-by-step explanation:

Passive diffusion, facilitated diffusion, and active transport are all different mechanisms that cells use to transport nutrients across the cell membrane.

In passive diffusion, small molecules or ions move across the cell membrane without any input of energy from the cell. Oxygen diffusion across the cell membrane is an example of passive diffusion.

In facilitated diffusion, molecules move from an area of higher to lower concentration using carrier proteins in the cell membrane. Glucose transport through a channel protein is an example of facilitated diffusion.

In active transport, the cell uses energy to move molecules against their concentration gradient. The sodium-potassium pump is an example of active transport.

Therefore, the correct classification of the examples are: a. Glucose transport through a channel protein (Facilitated diffusion), b. Oxygen diffusion across the cell membrane (Passive diffusion), c. Sodium-potassium pump in a cell membrane (Active transport). The answer is d. All of the above.