Cell Junctions

DAT sucks.

Types of Anchoring Junction

• Desmosomes

• Hemidesmosomes

• Adherens

• Middle Lamella

• Focal Adhesions

Function of Anchoring Junction:

protein attachment between adjacent cells

Examples of Anchoring Junction:

Cervix, Skin

Types of Communicating Junction:

• Gap junctions

• Plasmodesmata

Function of Communication Junction:

Passageway that allows transfer of chemical and electrical signals

Examples of Communicating Junction

Heart Tissue

Function of Tight Junction:

Tightly-knit seam that forms a seal to prevent passageway of material between animals

Example of Tight Junction

Digestive tract

Desmosomes

• Cell-to-cell adhesion

• Type of Anchoring Junction

Hemidesmosomes

• Cell-to-extracellular adhesion

• Type of Anchoring Junction

Adherens

• Cell-to-cell or cell-to-extracellular adhesion

• Type of Anchoring Junction

Middle Lamella

• Adheres 2 cell walls together

• Type of Anchoring Junction

Focal Adhesions

• Connect Cells to ECM via integrin and actin microfilaments

• Type of Anchoring Junction

Gap Junctions

• allows passage of ions and small molecules

• Type of Communicating Junction

• occurs in ANIMALS

Plasmodesmata

• Connects cytoplasm of adjacent PLANT cells

• facilitates exchange of water, nutriens, hormones, and signalling molecules

• Type of Communicating Junction

• occurs in PLANT cells