Smartbook 10.2

In animals, cell junctions that hold adjacent cells together or attach cells to the extracellular matrix are known as

anchoring junctions

The anchoring junction proteins that form the connections between cells are called

cell adhesion molecules

Functions of anchoring junctions

Attach cells to each other, bond cells to the extracellular matrix

What cell adhesion molecules require calcium ions for binding?

cadherins

CAMs

Cell Adhesion Molecules

Integrins

Cell adhesion molecules that do not require Ca²⁺ to function

Tight junctions

the cell junctions that form a seal between adjacent cells to prevent leakage of material

Anchoring junctions that create connections between cells and the extracellular matrix contain proteins called ______.

integrins

Tight junctions

Prevents material from passing in between adjacent cells of animals

Membrane proteins found in tight junctions

Occludin, claudin

Where are tight junctions commonly found?

Intestines

The presence of _ ions is required for two cadherin proteins to bind and promote cell-to-cell adhesion

Ca

Integrins

Cell-surface receptor proteins that create connections between cells and the extracellular matrix and do not require Ca²⁺ to function

Gap junction function in animals

Provide passageways for intercellular transport

Process that requires gap junctions

Coordinated contraction of cardiac muscle cells

Transmembrane proteins that form tight junctions

Occludin and claudin

Structure of a tight junction

interlaced strands of protein

Gap junctions

Junctions that forms channels between cells to enable cells to communicate with one another

Gap junctions in vertebraes are composed of

connexin

In a gap junction, an intercellular channel is formed by the alignment of channels called _ in adjacent cells.

connexons