Multicellularity and Cell Adhesion

These flashcards cover essential terms and concepts related to multicellularity, cell adhesion, and the roles of different molecules in these processes.

What is a multicellular organism?

An organism that develops from a single cell into multiple specialized cells that work together.

Define Extracellular Matrix (ECM).

A network of proteins and polysaccharides in the space between cells that provides structural support and regulates cell behavior.

What are Cell Adhesion Molecules (CAMs)?

Transmembrane proteins that mediate adhesion between cells, consisting of an intracellular domain, a transmembrane domain, and an extracellular domain.

What is the difference between homophilic and heterophilic binding in CAMs?

Homophilic binding occurs between the same types of CAMs on different cells, while heterophilic binding occurs between different types of CAMs on different cells.

What role do Integrins play in multicellular organisms?

Integrins mediate interactions between cells and the extracellular matrix and are involved in signaling.

Describe what Cadherins are used for.

Cadherins are CAMs that connect cells to each other through homophilic adhesion and require Ca2+ for their function.

What is the function of Ca2+ in Cadherin interactions?

Ca2+ is necessary for Cadherins to bind and function effectively in cell adhesion.

List some major families of Cell Adhesion Receptors.

Integrins, Selectins, Cadherins, and the Ig Superfamily.

What is the significance of tissue formation in multicellular organisms?

Tissue formation allows cells to group into functional units, facilitating complex biological processes.

What is the role of Integrins in signaling?

Integrins can play a role in transmitting signals from the extracellular environment to the cell's interior, influencing cell behavior.