Cell Communication Flashcards
0
Q
What is a ligand?
A
Signaling molecules
1
Q
What are the three steps in signaling pathway?
A
- Reception
- Transduction
- Response
2
Q
What is signal transduction?
A
Cascades of protein activity relay signals from receptors to target molecules I the cell
3
Q
What is protein kinase
A
The on switch
An enzyme that adds phosphate group to successive molecules
4
Q
What is protein phosphatase?
A
The off switch
De phosphorylation by protein phosphotases
5
Q
What are two major ways cells respond to a received signal?
A
- Regulate gene expression
2. Regulation of protein activity
