cell signalling Flashcards
1
Q
what is cell communication? and its importance
A
- occurs via signalling
- required to maintain life
2
Q
what is autocrine signal ?
A
- signalling by the same cell
3
Q
what is paracrine signal?
A
- signalling by nearby cells through cytokines
4
Q
what are cytokines?
A
any substance secreted by certain cells of immune system and have an effect on other cells
5
Q
what is endocrine signal?
A
- signalling from one part of the body to another via hormones
6
Q
what is synapse signal?
A
- neurotransmitters released from a nerve ending diffusing to receptors
7
Q
what are forms of cell signals ?
A
- hormones, light, heat, water, chemical elements
8
Q
what are functions of cell signalling?
A
- warn off pathogens/ infection
- alter metabolic processes
- switch on/ off feedback loops
9
Q
what must a signal be to move through a cell membrane ?
A
- lipid soluble
- steroid, thyroid, oestrogens
10
Q
what are the responses from cell signalling?
A
- changes metabolism of cell
- changes electrical charge across membrane
- change in gene expression
