Cell Junctions

Question 1

Cell Junction

Answer 1

is a type of structure that exists within the tissue of some multicellular organisms. A multiprotein complexes that provide contact between neighboring cells or between a cell and the extracellular matrix

Question 2

Types of junctions

Answer 2

1) anchoring junctions
2) tight junctions
3) gap junctions
4) plasmodesmata

Question 3

tight junction

Answer 3

completely encircles each cell, producing a seal that prevents the passage of materials between cells. In order to pass, must enter by diffusion or active transport
Ex: cells in digestive tract

Question 4

Gap junction

Answer 4

narrow tunnels between cells.Prevent cytoplasm of each cell from mixing but allow for the transport of ions and small molecules. (Basically are two channel proteins closely aligned)
Ex: heart tissue to pass electric impulses

Question 5

Plasmodesmata

Answer 5

narrow tunnel/tube of ER desmotubule between PLANT cells.