Tissue Vocab

Question 0

What are the 3 primary germ layers?

Answer 0

Endoderm
Mesoderm
Ectoderm

Question 1

What are the 4 types of tissue in the body?

Answer 1

Epithelial, connective, muscular, nervous

Question 2

What is a cell to cell junction?

How many types of cell to cell junctions are there?

Answer 2

The junction and adherence between the plasma membranes of neighbouring cells.

There are 5 types of cell to cell junction.

Question 3

What are the 5 types of cell to cell junctions?

Answer 3

1. Tight junctions - found in stomach, intestines, bladder. They prevent leaking.
2. Adheren junctions - zip locks layers of cells together.
3. Desmosomes - snaps and Velcro dots.
4. Hemidesmosomes - 1/2 a desmosome.
5. Gap junctions - connexion tunnels to allow communication or transfer of substances.

Question 4

What is a tight junction?

Answer 4

A tight junction has trans- membrane proteins that fuse the outer surface of adjacent cells to prevent leaking of substances into or out of blood and tissues. It looks Ike stitches or web. It forms a tight connection between cells.

Question 5

What are adheren junctions?

Answer 5

Contains a density of plaque proteins that are associated with actin microfilaments which in turn attach to cadherin proteins that project into the adjacent cell’s plaque. They can form adhesion belts.