Test 3 Flashcards
Diancephelon
Automatic Function of the brain.
What does the Diancephelon include?
- Hypothalamus
- Pineal Gland
- Thalamus
- Pituitary Glands
What else has automatic functions?
The midbrain.
What matter does the Spinal Chord have inside it?
What about outside of it?
Inside: Grey
Outside: White
What is the Dorsal Root Ganglion?
Sensory inputs that control nociception and pain transmission.
What do Ventral Motor Neurons do?
Leave the System
What does the autonomic have?
Sympatatetic
Parasympatetic
What is Sympatetic?
- Excitatory
- No cranial nerves.
- Increases available energy.
- Increases blood flow to muscle.
- Decreases digestive process.
What is Parasympatetic?
- Increases Storage.
- Decreases heart rate.
- Increases Salivation.
What does the Vagus nerve do?
Carries parasympatetic signals to larynx, lungs, abdominal viscera, and heart.
It is the biggest nerve.
When resting potential occurs, what charges are there and where are they at?
Positive outside.
Negative inside.
What maintains resting potential?
Diffusion of positive potassium on the membrane.
What happens when action potential occurs?
There is an influx of positive sodium cells and this changes the voltage of the inside to positive.
What opens to let sodium into cells?
Electrically Gated Channels
What do electronically gated channels do?
Open to allow positive sodium into the cell.
When they close 3 positive sodium ions leave the cell and 2 potassium ions come into the cell.
