Question

1. Epithelial Tissues

   1. Characteristics

   2. Location

   3. Types of cells

   4. Function

2. Cell - Cell Adhesions/Junctions

   1. Types

   2. Molecule types involved

   3. Locations

   4. Functions

3. Connective Tissues

   1. Characteristics

   2. Locations

   3. Types of cells

   4. Matrix

   5. Ground Substance

   6. Functions

4. Glandular Tissue

   1. Type of Glands

      1. (Examples: Exocrine vs Endocrine, Sudoriferous & its subtypes, Sebaceous, Ceruminous)

   2. Secretions

   3. Types of ducts

5. Serous and Mucous Membranes

   1. Serous

      1. Visceral vs Parietal

Answer 1

1)Epithelial tissues are covering on the outer surface of organs and blood vessels & the inner surfaces of cavities.

Location. - skin and inside hollow organ cavities

Characteristics :
1) Polarity– apical surface and basal surface.
2) Specialized contacts– tight junctions and desmosomes.
3) Avascular but innervated
4) Regeneration– high regenerative capacity and hence reproduce rapidly.

Types of epitheliuS

Simple epithelia– a single cell layer & present at site of absorption, secretion, and filtration

Stratified epithelia– two or more cell layers on each other

Type of cell
1. Squamous cells– flat cells
2. Cuboidal cells– box-like same height and width.
3.Columnar cells– are column shaped tall.

Functions - secretion, selective absorption, protection, transcellular transport.

2) Cell - Cell Adhesions/Junctions

Junctions that fasten the cells to one another and to
surrounding tissues

Types
- Zonula occludens (Tight Jn.)
- Zonula adherens (Adherens Jn.)
- Desmosome
- Hemidesmosome
- Focal adhesion

And

The Junctions that permit transfer of ions and other
molecules from one cell to another.
- The gap junction

Molecule types involved

three main families of transmembrane
proteins that contribute to tight junctions
1.occludin
2. junctional adhesion molecules (JAMs),
3. claudins

Gap junctions - connexons. It is made up of six protein subunits called connexin

Location - Blood brain barrier, intestinal epithelial, nephron

Function:
Tight junctions permit the passage of some ions
Junctions that permit transfer of ions and other
molecules from one cell to another.

Gap junctions-Permits substances to pass between the cells without entering the ECF