Histology cell membrane

What is the primary function of the phospholipid bilayer in the cell plasma membrane?

To separate substances inside and outside the cell (correct)
To recognize and respond to molecular signals
To regulate the entry and exit of ions, nutrients, and wastes
To establish a flexible boundary and support cell structure

Which type of transport mechanism involves the use of ATP or energy in the cell membrane?

Vesicular process
Simple diffusion
Active process (correct)
Passive transport

What is the primary function of receptors in the cell plasma membrane?

To recognize and respond to molecular signals (correct)
To regulate the entry and exit of ions, nutrients, and wastes
To support cell structure
To separate substances inside and outside the cell

Which type of transport involves the movement of molecules from high concentration to low concentration?

Passive transport (A) Signup and view all the answers

What is the function of aquaporin in the cell plasma membrane?

To transport water molecules (D) Signup and view all the answers

Which type of endocytosis involves the movement of large materials into the cell through the use of receptors?

Receptor-mediated endocytosis (C) Signup and view all the answers

What is the function of the cell plasma membrane in establishing a flexible boundary?

To support cell structure and protect cellular contents (D) Signup and view all the answers

What is the primary function of phagocytosis?

To engulf and digest large particles and microorganisms. (B) Signup and view all the answers

In receptor-mediated endocytosis, what is the role of clathrin?

It facilitates the invagination of the cell membrane. (A) Signup and view all the answers

What is the primary difference between phagocytosis and pinocytosis?

Phagocytosis involves the engulfment of large particles, while pinocytosis involves the uptake of soluble materials. (D) Signup and view all the answers

What is the fate of the coated vesicle in receptor-mediated endocytosis?

It fuses with lysosomes and degrades the engulfed materials. (C) Signup and view all the answers

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. (C) Signup and view all the answers

What is the primary function of exocytosis in a cell?

To regulate the release of materials from the cell (B) Signup and view all the answers

What is the primary function of transcytosis?

To transport materials from one side of the cell to the other. (B) Signup and view all the answers

In which type of cells does phagocytosis primarily occur?

Macrophages and neutrophils. (C) Signup and view all the answers

What triggers the release of vesicles from the cell membrane in regulated secretion?

A signal such as a hormone or neurotransmitter (A) Signup and view all the answers

What is the primary difference between regulated and constitutive secretion?

The signal that triggers secretion (A) Signup and view all the answers

What is the term for the process by which the cell membrane recycles itself?

Membrane trafficking (B) Signup and view all the answers

What is the purpose of the Golgi apparatus in exocytosis?

To package materials for secretion (C) Signup and view all the answers

What is constitutive secretion an example of?

Continuous secretion of certain proteins (C) Signup and view all the answers

What is the term for the selective permeability of the cell membrane?

Selective permeability (D) Signup and view all the answers

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 (C) Signup and view all the answers

What is the relationship between exocytosis and endocytosis?

Exocytosis and endocytosis are complementary processes (D) Signup and view all the answers