Neural function Flashcards
What is the frontal lobe of the brain responsible for?
Planning, emotion, mood, behaviour, motor function, smell
When a sufficient action potential arrives at a pre-synaptic neuron, what two channels are ‘opened’?
Sodium and Calcium
How would you describe the nature of the pre-synaptic channels?
Voltage-gated
Which chemical binds to SNARE proteins and what is the purpose of this binding?
- Calcium
- To ‘pull’ the pre-synaptic vesicles into the lipid bilayer and allow it to ‘merge’.
Why do the pre-synaptic vesicles need to ‘merge’ with the lipid bilayer?
To allow for neurotransmitters to leave the pre-synaptic cell and move across the synaptic cleft.
How would you describe the natures of the post-synaptic channels?
Chemically-gated
What happened when excitatory neurotransmitters bind to the proteins on the bilayer of the post-synaptic neutron?
Sodium channels open which increases the action potential of post-synaptic neuron
What would happen if the neurotransmitters were to bind to K+ proteins on the post-synaptic neutron?
This would have an inhibitory affect by allowing K+ to enter the cell and therefore lowering the action potential.
What are the four main roles of Astrocytes?
1) Neuronal support
2) Repair & damage of neural tissue
3) Regulate neuronal connections
4) Maintain blood-brain barrier
Which glial cell is responsible for myelination within the CNS?
Oligodendrocytes
Which glial cell is responsible for myelination within the PNS?
Schwann cells
Where are the ependymal cells found AND what is their function?
- The ventricles of the brain
- Production of cerebrospinal fluid and removal of waste products from the brain
Which glial cell is found in the PNS , supports and protects neutrons and regulates the neural environment?
Satellite cells
What are the levels of Sedan’s nerve injury classification?
1) Neuropraxia
2) Axonotmesis
3) Neurotmesis
“…a transient conduction block of motor or sensory function without nerve degeneration.” - what is being described here?
Neuropraxia
