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Multiple Choice
Which of the following are types of endocytosis?
A
Exocytosis and osmosis
B
Diffusion and active transport
C
Facilitated diffusion and osmosis
D
Phagocytosis and pinocytosis
Verified step by step guidance
1
Understand the concept of endocytosis: Endocytosis is a cellular process in which substances are brought into the cell. It involves the engulfing of external materials by the cell membrane, forming a vesicle that is brought into the cell.
Identify the types of endocytosis: The main types of endocytosis are phagocytosis and pinocytosis. Phagocytosis is the process by which cells ingest large particles, such as bacteria or dead cells, while pinocytosis involves the ingestion of liquid and small particles.
Differentiate endocytosis from other processes: Exocytosis is the opposite of endocytosis, where materials are expelled from the cell. Osmosis is the movement of water across a semipermeable membrane, not involving vesicle formation. Diffusion and facilitated diffusion are passive transport processes, and active transport requires energy to move substances against their concentration gradient.
Eliminate incorrect options: Exocytosis and osmosis, diffusion and active transport, and facilitated diffusion and osmosis do not involve the engulfing of materials into the cell via vesicles, so they are not types of endocytosis.
Conclude with the correct answer: Phagocytosis and pinocytosis are the correct types of endocytosis, as they both involve the internalization of substances into the cell through vesicle formation.