Chapter 5.4.1 (Exam 1) Extracellular Structures

Question 1

How do extracellular structures form?

Answer 1

They are secreted to the outside of the cell membrane

Question 2

What do the extracellular structures consist of in eukaryotes?

Answer 2

Fibrous macromolecules embedded in a gel-like medium

Question 3

What are plant cell walls formed by?

Answer 3

Cellulose fibers embedded in other complex polysaccharides and proteins

Question 4

What are plasmodesmata?

Answer 4

Cell membrane-lined channels that connect adjacent plant cells

Question 5

What is the function of plasmodesmata?

Answer 5

Permit movement of water, ions, small molecules, RNA, and protein

Question 6

What is the function of plant cell walls?

Answer 6

Provide rigid yet flexible support for the plant

Are a barrier to disease organisms

Contribute to plant form as growing cells expand

Question 7

What is the extracellular matrix in animals composed of?

Answer 7

fibrous proteins such as collagen, gel-like proteoglycans, and other proteins

Question 8

What is the function of the ECM?

Answer 8

FCHOP
Filters materials passing between different tissues

Contributes to properties of bone, cartilage, skin, etc

Holds cells together in tissues

Orients cell movements in development and tissue repair

Plays a role in chemical signaling