Chapter 11 - Cell-Cell interactions

Chitin

Which would you NOT find in a plant cell wall?:

Plant ECM is rigid, animal ECM is not

Major difference between plant ECM and animal ECM?:

Extracellular matrix

Collagen fibers and calcium salts around osteocytes are the:

Karatin 

Which protein is NOT found in animal ECM?: 

ECM and cytoskeleton

Integrins attach to: 

Gap junctions 

Plasmodesmata in plant cells are similar to which animal structure?: 

Gap junctions

Ions travel directly between animal cells through:

Cells must communicate and adhere to each other

For a tissue/organ to function as a unit:

Epithelial tissue (e.g., intestine)

Where are tight junctions found?: 

DNA

Which cannot pass through a gap junction?:

Plant cells

Plasmodesmata are cell–cell junctions between:

Target cell

A cell with receptors that bind a specific hormone is the hormone’s: 

They have different receptors or different internal signaling pathways

Different body cells respond differently to the same peptide hormone because: 

Steroids are lipid-solubles

The receptors for steroid hormones are located inside the cell instead of on the membrane surface like most other signal receptors. This is NOT a problem for steroids because: 

3-1-5-2-4

Order of signal transduction steps in order:

 Signal binds receptor → receptor activates enzyme → second messenger released → kinases activated →  proteins phosphorylated

Phosphorylates proteins (adds phosphate groups)

Protein kinase is an enzyme that:

Have the correct receptor points

For a target organ to respond to a hormone, it must: 

Receptor tyrosine kinases (RTKs)

Which receptor forms dimers, autophosphorylates, and activates relay proteins?: