401632
Description
Flashcards by Sophie Mae Neash, updated more than 1 year ago
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Created by Sophie Mae Neash
over 10 years ago
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| Question | Answer |
| What hormones stimulate glycogenolysis? | Glucagon and adrenaline |
| What is the secondary messenger for this process? | Cyclic AMP (cAMP) |
| How is cAMP produced? | From ATP using adenyl cyclase |
| What does cAMP do? | Activates Protein Kinase A (PKA) |
| What does PKA then do? | Activates phosphorylase kinase by phosphorylating it. |
| What does activated PK then do? | Phosphorylates (activates) glycogen phosphorylase |
| What reaction does glycogen phosphorylase catalyse? | Glucose-6-phosphate to glucose |
| Why can glucose not be formed from glycogen in the muscle? | As they lack glycogen phosphorylase enzyme |
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