What are plant cell walls made up of?

cellulose

What are fungi cell walls made up of?

chitin

What are Protists cell walls made up of?

species dependent

What are bacteria cell walls made up of?

Peptidoglycan

What are Archaea cell walls made up of?

various polysaccharides

What are the purposes of the plant cell wall?

1. maintain shape 2. prevents plant from up taking too much water

What are the 3 subunits of the plant cell wall?

1. Primary cell wall 2. Middle Lamella 3. Secondary cell wall

Primary Cell Walls are what?

thin and flexible, the first to develop

The Middle Lamella is what?

rich in pectin, glues adjacent plant cells together

The Secondary Cell Walls are what?

several laminated layers of strong and durable matrix that rest between the primary cell wall and membrane.

What is a good example of a plant with a secondary cell wall?

the wood in trees

What do animal cells have instead of a cell wall?

an extensive extracellular matrix (ECM)

what are the main ingredients in the ECM

glycoproteins and other carbohydrates

What is the most common glycoprotein in the ECM?

Collagen; 40% of protein in humans

What is the location of collagen in the ECM?

imbedded in the network woven out of proteoglycans

How are some cells attached to the ECM?

by glycoproteins such as fibronectin

How does fibronectin and other glycoproteins bind to the cell?

using cell-surface receptor proteins called integrins

What are the other 2 proteins that animal cells use?

1. glycolipids 2. MHC proteins

What do glycolipids do?

tell the immune system that the cell belongs

What do MHA proteins do?

help recognize self and non-self cells