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All of the following are examples of passive transport except:

A.

filtration.

B.

osmosis.

C.

endocytosis.

D.

dialysis.

Answer and Explanation

The Correct Answer is C

A. filtration: This is a passive process where water and solutes are forced through a membrane by hydrostatic pressure.

B. osmosis: This is the passive diffusion of water.

C. endocytosis: This is a form of active transport (vesicular transport) that requires ATP to engulf substances into the cell.

D. dialysis: This is the passive diffusion of solutes across a selectively permeable membrane.


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Related Questions

Correct Answer is A

Explanation

A. Thalamus: The thalamus acts as a relay station where we first become aware of a sensation in a "crude" or unrefined way before it is processed for detail elsewhere.

B. Cerebellum: The cerebellum processes proprioception and coordination but does not produce conscious sensory awareness.

C. Brainstem: The brainstem handles vital reflexes and signal conduction but is not the center for conscious sensory awareness.

D. Cerebral cortex: The cortex provides "fine" or precise sensory discrimination (exactly where and what a sensation is), which is the opposite of "crude" awareness.

Correct Answer is D

Explanation

A. Allows the body to avoid the use of oxygen: This describes anaerobic respiration. Aerobic respiration requires oxygen.

B. Results in the formation of an incompletely catabolized molecule: This describes fermentation or anaerobic pathways. Aerobic respiration completely breaks glucose down into CO2 and H2O.

C. Results in the formation of lactate: Lactate is a product of anaerobic metabolism (glycolysis without oxygen).

D. Produces the maximum amount of energy: By using the Krebs cycle and Electron Transport Chain, aerobic respiration yields significantly more ATP (approx. 36-38) than anaerobic processes (2 ATP).

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