Cell signalling

Question 1

What is cell signalling?

Answer 1

Communication between cells.

Question 2

What are the 4 different ways of cells communicating?

Answer 2

1. Contact dependent
2. Paracrine
3. Endocrine
4. Neuronal

Question 3

Contact dependent signalling

Answer 3

Touching. Membrane bound signal molecule.

Question 4

Paracrine signalling

Answer 4

Secrete things within local vacinity

Question 5

Endocrine signalling

Answer 5

Homones secreated by one tissue or groups of cells. Signal see by every cell in the body.

Question 6

Neuronal signalling is not Cell signalling!

Answer 6

Constantly firing with electrical and chemical signalling.

Question 7

What is wnt?

Answer 7

Secreated protein. Idea was in a paracrine fashion.

Question 8

Transport proteins

Answer 8

Latch onto another protein.

Question 9

Exovesicles

Answer 9

From vesicles to move into another cell

Question 10

Cytoneme

Answer 10

Send finger like processors and give the protein to cell.

Question 11

Post translational modifications

Answer 11

Phosphorylation. Anything that happens to the protein after translation has taken place.

Question 12

Phosphorilation

Answer 12

Addition of a phosphate group to 3/20 particular amino acids:
Threonine
Serine
Tyrosine

By a Kinase - movement of Phosphase from ATP to a protein.

Question 13

De-phosphorilation

Answer 13

Phosphetase - Take phosphate off.