When a substance wants to enter a cell it goes through the cell membrane in a process called endocytosis.
Cell membranes allow the regulation of what enters and exits the cell, maintaining cell homeostasis. They also provide structural support and separate the cell's internal environment from the external environment. Additionally, cell membranes facilitate cell communication and recognition.
Membrane Proteins, or transport site, these sites act as transporters, enzymes, cell surface receptors and cell surface identity markers, as well as aiding in cell-to-cell adhesion and securing the cytoskeleton.
Flu viruses enter cells through endocytosis, a process where the cell engulfs the virus in a vesicle formed from the cell membrane. Diphtheria toxin enters cells through receptor-mediated endocytosis, where the toxin binds to a cell surface receptor and is internalized. Cholera toxin is taken up by clathrin-dependent endocytosis, where the toxin binds to a receptor on the cell surface and is internalized in clathrin-coated vesicles.
Cell membranes usually allow water, gases (such as oxygen and carbon dioxide), and small uncharged molecules to enter a cell. Larger molecules or charged ions may require specific transport proteins or channels to cross the membrane.
This is called endocytosis.
Extracellular
osmosis
An agonist is a chemical that binds to a receptor of a cell and triggers a response by the cell. An agonist often mimics the action of a naturally occurring substance.
water
Selective permeable
Selective permeable
Selective permeable
Selective permeable
It is called a receptor protein.
Cell membranes allow the regulation of what enters and exits the cell, maintaining cell homeostasis. They also provide structural support and separate the cell's internal environment from the external environment. Additionally, cell membranes facilitate cell communication and recognition.
Membrane Proteins, or transport site, these sites act as transporters, enzymes, cell surface receptors and cell surface identity markers, as well as aiding in cell-to-cell adhesion and securing the cytoskeleton.
The inducer.