23 Questions
What is the primary function of the phospholipid bilayer in the cell plasma membrane?
To separate substances inside and outside the cell
Which type of transport mechanism involves the use of ATP or energy in the cell membrane?
Active process
What is the primary function of receptors in the cell plasma membrane?
To recognize and respond to molecular signals
Which type of transport involves the movement of molecules from high concentration to low concentration?
Passive transport
What is the function of aquaporin in the cell plasma membrane?
To transport water molecules
Which type of endocytosis involves the movement of large materials into the cell through the use of receptors?
Receptor-mediated endocytosis
What is the function of the cell plasma membrane in establishing a flexible boundary?
To support cell structure and protect cellular contents
What is the primary function of phagocytosis?
To engulf and digest large particles and microorganisms.
In receptor-mediated endocytosis, what is the role of clathrin?
It facilitates the invagination of the cell membrane.
What is the primary difference between phagocytosis and pinocytosis?
Phagocytosis involves the engulfment of large particles, while pinocytosis involves the uptake of soluble materials.
What is the fate of the coated vesicle in receptor-mediated endocytosis?
It fuses with lysosomes and degrades the engulfed materials.
What is the role of caveolin in receptor-mediated endocytosis?
It is a protein involved in receptor-mediated endocytosis in endothelial cells and smooth muscle cells.
What is the primary function of exocytosis in a cell?
To regulate the release of materials from the cell
What is the primary function of transcytosis?
To transport materials from one side of the cell to the other.
In which type of cells does phagocytosis primarily occur?
Macrophages and neutrophils.
What triggers the release of vesicles from the cell membrane in regulated secretion?
A signal such as a hormone or neurotransmitter
What is the primary difference between regulated and constitutive secretion?
The signal that triggers secretion
What is the term for the process by which the cell membrane recycles itself?
Membrane trafficking
What is the purpose of the Golgi apparatus in exocytosis?
To package materials for secretion
What is constitutive secretion an example of?
Continuous secretion of certain proteins
What is the term for the selective permeability of the cell membrane?
Selective permeability
What is the role of the cell membrane in regulating the movement of substances?
To regulate the movement of substances in and out of the cell
What is the relationship between exocytosis and endocytosis?
Exocytosis and endocytosis are complementary processes
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