Communication, Homeostasis and energy Flashcards
1
Q
What is cell signalling?
A
2
Q
How do cells detect signals?
A
by using receptors on their plasma membranes
3
Q
What can the receptors on the plasma membranes of cells usually be?
A
Glycoproteins and glycolipids
4
Q
What happens when signalling molecules bind to the receptor ?
A
A set of chain reactions is instigated within the cell and this leads to a result in the cell
5
Q
What external environments to cells react to?
A
- Temperature
- Carbon dioxide
- Levels of light
6
Q
What internal environments to cells react to?
A
- Blood C02, which if too high can inhibit cell activity.
- Lactic acid, which denatures proteins in the body
- Urea, which is topic
7
Q
What are the features of a good communication system?
A
- Cover the whole body
- Allow one cell to communicate with another specific cell
- Allow a cell to communicate with many cells
- Be fast
- Allow for both long term messaging and short term signalling
8
Q
A
