Animal cell surface

Question 1

Cell adhesion molecules

Answer 1

Bind cells together

Question 2

Cell junctions

Answer 2

Seal spaces between cells and provide communications

Question 3

Extracellular matrix

Answer 3

Support and protect cells and provide mechanical linkages

Question 4

Cell adhesion molecules details

Answer 4

Glycoproteins embedded in the plasma membrane. Help maintain body form and structure by binding to molecules and other cells

Question 5

Cell adhesions is utero

Answer 5

Initial connections are formed and then break and reform as the embryo grows

Question 6

Cell adhesions adults

Answer 6

The connections become permanent

Question 7

Cancer adhesions

Answer 7

Can break allowing the tumor to spread around the body

Question 8

Bacteria and virus’ target

Answer 8

Cell adhesion sites for sites of infection

Question 9

Organ rejection

Answer 9

Is a immune response due to foreign cells surface molecules

Question 10

3 types of junctions

Answer 10

Anchoring, tight and gap

Question 11

Anchoring junction

Answer 11

Button or belt like spots are created to weld cells together

Question 12

Desmosomes

Answer 12

Intermediate filaments anchor the junction in the cytoplasm

Question 13

Adheres junction example

Answer 13

Heart, muscles, skin

Question 14

Adheres junction

Answer 14

Microfilaments anchor to the cytoskeleton, commonly seen in stretchy or shear cells

Question 15

Tight junctions

Answer 15

Tight connections. Can prevents ions from coming between. Seal the spaces between cells

Question 16

Tight junction examples

Answer 16

Outer surface of the body, lining of internal cavities, the stomach

Question 17

Creation of tight juncitons

Answer 17

Proteins on the outer surface of the plasma membrane fuse. Appears like stitch work.

Question 18

Gap junctions

Answer 18

Open channels that allow ions/small molecules to pass cell to cell. Protein cylinders line up to create a pipeline connecting cytoplasms

Question 19

Gap junctions adavantage

Answer 19

They allow for immediate communication

Question 20

Gap junctions in vertabrets

Answer 20

Almost all body tissue. Heart, uterus, and dental pulp. Allows for organs to coordinate

Question 21

Extracellular matrix

Answer 21

Made of proteins and polysaccharides. Many cells are imbedded in it

Question 22

Primary function of the Extracellular matrix

Answer 22

Protection and support

Question 23

Other functions of the Extracellular matrix

Answer 23

Forms masses of skin, bone, tendon, cornea, kidney, cell division, embryonic development, reaction to wounds and disease

Question 24

Glycoproteins

Answer 24

Main component of the Extracellular matrix

Question 25

Collagen

Answer 25

The most abundant glycoprotein in animals. Strong and elastic. Makes up 1/2 of protein by mass in vertebrates

Question 26

Extracellular matrix consistancy

Answer 26

Can be soft and jelly like or and elastic.

Question 27

Extracellular matrix texture depends on

Answer 27

the number of interlinks which determines the amount of trapped oxygen

Question 28

Proteoglycans

Answer 28

Glycoproteins made up of small proteins non covalently bonded to polysaccharide molecules

Question 29

Fibronectins

Answer 29

A glycoprotein that organizes Extracellular matrix and allow cells to bond to their receptor proteins called integrins.

Question 30

Integrins

Answer 30

Cover the plasma membrane

Question 31

Integrins on the cytoplasm side

Answer 31

Bind to microfilaments of the cytoskeleton and make change to the cell by communicating to the cytoskeleton