17 Questions
What is the main component of a plasma membrane?
Phospholipid
What is the hydrophilic part of a phospholipid molecule?
Glycerol and phosphate group
Why do phospholipids arrange themselves in a specific way in a membrane?
Because one side of the phospholipid is hydrophobic and repels the aqueous environment
What is the approximate thickness of a cell membrane?
7nm
What type of molecules are the tails of a phospholipid?
Non-polar
What is the main purpose of carrier proteins in membrane transport?
To facilitate diffusion of specific molecules
What is the term for the movement of free water molecules through a partially permeable membrane?
Osmosis
What is the role of ATP in active transport?
To provide immediate energy for active transport
What is the main function of the fluid mosaic model of membrane structure?
To explain the structure of the cell membrane
What is the term for the process in which cells take in molecules from outside the cell?
Endocytosis
What is the term for the process in which cells release molecules outside the cell?
Exocytosis
What is the movement of water from an area of high water potential to an area of low water potential through a partially permeable membrane?
Osmosis
What is the process by which cells take in solid material from outside the cell?
Phagocytosis
What is the term for the movement of molecules from an area of high concentration to an area of low concentration without using energy?
Passive transport
What is the term for the 'tendency of water to move out of a solution by osmosis'?
Water potential
What is the process by which cells release substances out of the cell that have a function rather than being a waste product?
Exocytosis
What is the structure of the cell membrane that allows it to regulate what enters and leaves the cell?
Phospholipid bilayer
Test your understanding of cell transport mechanisms, including endocytosis and exocytosis, and the different types of cellular transport such as phagocytosis and pinocytosis.
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