Question

All transport through the plasma membrane can be classified as __________.

A. either pinocytosis or phagocytosis

B. either active or passive

C. either diffusion or osmosis

D. either permeable or impermeable

Answer 1

Transport through the plasma membrane is classified as either active or passive. Active transport requires energy, while passive transport does not require energy and includes diffusion and osmosis. Thus, the option B is the correct answer

Step-by-step explanation:

All transport through the plasma membrane can be classified as either active or passive.

Active Transport

Active transport refers to the movement of a substance across the cell membrane from an area of lower concentration to an area of higher concentration, against the concentration gradient. This process uses proteins within the cell membrane that act as "pumps," utilizing cellular energy (ATP) to move the substance. Examples include ion pumps and processes like phagocytosis and pinocytosis which are forms of endocytosis.

Passive Transport

Passive transport is the movement of substances from an area of higher concentration to an area of lower concentration without the use of cellular energy. It includes diffusion, osmosis, and facilitated diffusion.