CONTROL OF INSULIN SECRETION 0.0 / 5 ? BiologyCommunication and HomeostasisA2/A-levelOCR Created by: Ayz_amillionCreated on: 12-11-18 12:28 MECHANISM OF INSULIN SECRETION 1) At normal blood gluc conc, potassium ion channels in beta cells are open. 1 of 10 2 Potassium ions diffuse out of cell 2 of 10 3 Inside of cell is -70mv 3 of 10 4 When blood gluc conc is high, glucose enters cell via glucose transporter 4 of 10 5 Glucose metabolised inside mitochondria= ATP 5 of 10 6 ATP binds to ATP sensitive potassium ion channels 6 of 10 7 Potassium ion channels close and potassium ions stay inside = -30mv 7 of 10 8 Causes volatage gated calcium channels to open 8 of 10 9 Calcium ions enter cell 9 of 10 10 Vesicles containing insulin bind to the plasma membrane to release insulin by EXOCYTOSIS 10 of 10
Comments
No comments have yet been made