11.3 Ca2+ and Inositol Triphosphate (IP3) Flashcards
1
Q
in ANIMALS what does increase concentration ca2+ do
A
muscle contractions
- secreting some substances
- cell division
2
Q
in PLANTS what does increase concentration ca2+ do
A
greening in response to light
3
Q
calcium gradient
A
- -sometimes up to 10,000x higher OUTSIDE the cell
- -it is actively transported out of the cell and ‘-
- -into the ER
4
Q
calcium release into cytosol involves ____ and ____
A
inositol triphosphate (IP3) diacylglycerol (DAG)
5
Q
how is IP3 an DAG produced
A
–cleavage by certain kind of phospholidip in the plasma membrane
6
Q
what to IP3 and DAG do
A
DAG= second molecule in other pathways IP3= opens the calcium channel (gated) to let in Ca2 which activates other proteins
