Insulin, Glucagon and Adrenaline Flashcards
1
Q
what cells secrete glucagon?
A
- alpha cells - in the islets of langerhans
2
Q
what cell secrete adrenaline?
A
- adrenal glands
3
Q
what cells secrete insulin?
A
- beta cells - in the islets of langerhans
4
Q
when does this happen for glucagon?
A
- low blood glucose
5
Q
when does this happen for adrenaline?
A
- low blood glucose
6
Q
when does this happen for insulin?
A
- high blood glucose
7
Q
where does glucagon attach to the receptors?
A
- liver
8
Q
where does adrenaline attach to the receptors?
A
- liver
9
Q
where does insulin attach to the receptors?
A
- liver and muscles
10
Q
what does glucagon have the effect on blood glucose?
A
- increases it
11
Q
what does adrenaline have the effect on blood glucose?
A
- increases it
12
Q
what does insulin have the effect on blood glucose?
A
- decreases it
13
Q
what are the mechanisms of glucagon?
A
- decreases the rate of respiration
- glycogenolysis (glycogen to glucose)
- glycogeneolysis
(non carbs to glucose)
e.g. lipids and amino acids
14
Q
what are the mechanisms of adrenaline?
A
- activates glycogeneolysis
- secretes insulin
- inhbits glycogenosis
- secretion of glucagon
15
Q
what are the mechanisms of insulin?
A
- increases the rate of respiration
- glucogensis (glucose -> glycogen)
- increase liver + muscle cells
- permeability beta glucose
