12 Questions
Which of the following is NOT a component of cell membrane structure?
Nucleic acids
What is the primary function of the cell membrane?
To separate the cytoplasm from its extracellular environment
What is the primary function of cholesterol in cell membranes?
To restrict the movement of phospholipid fatty acids, modulating membrane fluidity
What is the term used to describe membrane lipids that contain both hydrophobic and hydrophilic regions?
Amphipathic
Which of the following lipids is prominent in myelin sheaths?
Sphingomyelin
What is the process by which the cell membrane exchanges material with the extracellular fluids?
Endocytosis and exocytosis
What is the main classification of membrane proteins?
Peripheral and integral proteins
What is the process by which the cell uptakes large particles or fluid from the extracellular medium to the inside the cell?
Endocytosis
Which type of endocytosis involves the ingestion of large particles such as viruses, bacteria, cells, or debris?
Phagocytosis
What is the term for the release of macromolecules to the exterior of the cell?
Exocytosis
What is an example of a molecule that is internalized by coated pits containing its specific receptor?
Low-density lipoprotein (LDL)
What is the transport of small molecules across the membrane classified into?
Passive and active transport
Learn about the importance and structure of cell membranes, including their components, selective permeability, and functions such as exocytosis and endocytosis. Understand the composition of membranes and their roles in separating the cell from its environment.
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