Tissues

Question 1

Cell Junctions / 3 Types

Answer 1

-Points of contact between adjacent cells- seen in epitheial tissue, nervous and muscle cells
1- Tight Junctions
2- Anchoring Junctions
3- Gap Junctions

Question 2

Tight Junctions

Answer 2

• Is a cell junction
• partial fusion of specific proteins in the lateral surface of cell membrane
• Prevents material from passing between cells

Question 3

Anchoring Junctions

Answer 3

• Proteins that fasten cells to each other and/or extracellular material
• “rivet’ together
• Ex. desmosomes

Question 4

Gap Junction

Answer 4

• open channels through the adjacent cell membranes to interconnect cytosols of cell
• Allows ions/small molecules to pass between cells
• Allows tissue to work as a unit (cardiac and smooth muscle)

Question 5

Epithelial Tissue

Answer 5

Lining tissue

• Covers body/ organ cavities (organ cavity = lumen)
• Has one free surface
• little extracellular space between cells
• avascular- no blood vessels

Question 6

Connective Tissue

Answer 6

Connecting Tissue

Question 7

Muscle Tissue

Answer 7

Contractile Tissue
-Subtypes: 
1- Skeletal (Striated)
2- Cardiac (Striated)
3- Smooth (non-striated

Question 8

Nervous Tissue

Answer 8

Signalling Tissue
-Cell types:
1- Neuron- conduct electrical impulses
2- Glial Cells - Support and protect neurons