Hormonal Communication Flashcards
(9 cards)
1
Q
Nerves in the brain that cause speeding up and slowing down of heart
A
Accelerator and Vagus
2
Q
Describe the processes of insulin secretion
A
- normal BGL potassium channels are open, k+ ions diffuse out
- Rise in BGL, glucose enters cell by glucose transporter
- Glucose is metabolised in mitochondria - ATP produced
- ATP binds to ATP sensitive potassium channels causing them to close
- No diffusion on potassium ions out, potential difference changes to -30mV.
- Depolarisation causes calcium channels to open
- Calcium ions enter cell causing secretory vessels to exocytosise insulin
3
Q
The difference between Type 1 and Type 2 diabetes mellirus
A
Type 1 - People cannot produce insulin
Type 2 - Beta cells not producing enough or persons body not responding to insulin
4
Q
What are the two parts of the Adrenal Glands and their functions?
A
The Cortex: Produces Adrenaline
The Medulla: Produces Glucocorticoids
5
Q
What do Alpha Cells produce?
A
Glucagon
6
Q
What do Beta Cells produce?
A
Insulin
7
Q
Where are Alpha and Beta Cells found?
A
The Islets of Langerhans
8
Q
In the Fight or Flight response, what are the primary and secondary messengers?
A
Primary: Adrenaline
Secondary: Cyclic AMP
9
Q
Where does Adrenaline bind to?
A
Cell surface membrane
