12 Questions
What is the primary function of the plasma membrane in a cell?
To separate the internal cytoplasm from the external environment
What is the arrangement of the phospholipid bilayer in the plasma membrane?
Hydrophilic polar heads on the outer surface and nonpolar tails on the inner surface
What is the role of cholesterol in the plasma membrane?
To increase the fluidity of the membrane
What is the function of glycoproteins and glycolipids in the plasma membrane?
To contribute to the cell’s ‘fingerprint’ for cellular identification
What is the role of channel proteins in the plasma membrane?
To allow the passage of molecules through the membrane via a channel
What type of proteins are found on the inner surface of the plasma membrane?
Peripheral proteins
What is the primary function of carrier proteins in the plasma membrane?
To assist in the passage of molecules through the membrane
Why are organ transplants often difficult?
Because the donor's MHC glycoproteins are not compatible with the recipient's
What is the role of adenylate cyclase in the body?
To catalyze a specific reaction involved in ATP metabolism
What is the result of faulty plasma membrane growth hormone receptors?
Some forms of dwarfism
What is the purpose of tight junctions between cells?
To join cells together to form a functional tissue
What is the result of the failure of the liver to store glucose as glycogen?
Diabetes
Test your knowledge on the structure and function of the plasma membrane, which separates the cell's internal cytoplasm from its external environment. Learn about the Fluid Mosaic Model, phospholipid bilayer, and more.
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