steps to secrete insulin

Cards (8)

what is the first step to the secretion of insulin?
The cell membrane of the beta cell has potassium and calcium ion channels
what is the second step to the secretion of insulin?
Potassium ion channels are normally open, so potassium ions flow out
What is the third step to the secretion of insulin?
When blood glucose concentration is high, glucose moves into the cell
What is the fourth step of the secretion of insulin?
glucose is metabolised to produce ATP
what is the fifth step of the secretion of insulin?
The ATP closes potassium ion channels
what is the sixth step of the secretion of insulin?
accumulation of potassium ions alters the potential difference across the cell membrane, so the inside is less negative
what is the seventh step in the secretion of insulin?
The change in potential difference opens the calcium ion channels
what is the eighth step in the secretion of insulin?
calcium ions cause the vesicles of insulin to fuse with the cell membrane, releasing insulin through exocytosis