Chap 16 Cell Signaling

cell and molecular

Cell signaling understanding comes from…

Study of cancer cells

What are the 4 categories of Cell Signaling

1. Cell-to-Cell signaling

2. Autocrine Signaling

3. Paracrine Signaling

4. Endocrine Signaling

What is Cell-to-Cell Signaling

Signal is in the membrane of the cell and then neighboring cell has a receptor for it and they are physically touching 

• happens through integrins

What are Endocine Signaling?

The signaling molecules are called hormones, secreted by endocrine glands and taken to the bloodstream where then they go to their target cells

• Site of production is faraway from site of interaction

What are paracrine signaling?

Molecules released by 1 cell act on neighboring target cells

• Neurotransmitters

Autocrine signaling iss?

Cell is releasing the signal and it has a receptor on itself where cells respond to signaling molecules that they produce

• T lymphocytes respond to antigens and make a growth factor that drives their own proliferation , amplifying the immune response

Plant cells have.. what is homologous to gap junctions?

Plasmodeschmata