Ion pumps and phagocytosis are both examples of __
A.
endocytosis
B.
passive transport
C.
active transport
D.
facilitated diffusion
The correct answer is:
C. Active transport
Explanation:
- Ion pumps: These are a type of active transport mechanism that move ions across cell membranes against their concentration gradient, requiring energy (usually from ATP).
- Phagocytosis: This is a form of endocytosis where cells engulf large particles or other cells, also requiring energy to move the cell membrane and internalize the material.
Both ion pumps and phagocytosis involve the use of energy to transport substances across cell membranes, which classifies them as active transport processes.
- A. Endocytosis: This is a broad term for processes like phagocytosis where cells take in materials, but it doesn’t encompass ion pumps.
- B. Passive transport: This involves the movement of substances across membranes without the use of energy, such as diffusion.
- D. Facilitated diffusion: This is a type of passive transport that uses transport proteins to move substances across cell membranes, but it does not require energy.
Correct answer: C