Multiple Choice
Which vesicle is responsible for carrying receptors back to the plasma membrane?
13. Intracellular Protein Transport
Endocytic Pathways
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is not an endocytic pathway?
A
Receptor-mediate endocytosis
B
Pinocytosis
C
Fluid uptake
D
Phagocytosis
Verified step by step guidance1
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 endocytic pathways: The main types of endocytic pathways include receptor-mediated endocytosis, pinocytosis, and phagocytosis.
Define receptor-mediated endocytosis: This is a specific type of endocytosis where cells absorb metabolites, hormones, proteins – and in some cases, viruses – by the inward budding of the plasma membrane, which contains proteins with receptor sites specific to the molecules being absorbed.
Define pinocytosis: Often referred to as 'cell drinking,' pinocytosis is a form of endocytosis where the cell ingests extracellular fluid and its dissolved solutes.
Define phagocytosis: Known as 'cell eating,' phagocytosis is a process where cells engulf large particles or even other cells, typically used by immune cells to remove pathogens or debris. Compare these with 'fluid uptake,' which is a general term and not a specific endocytic pathway.
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