Neuro

Question 1

cytoskeleton of neurone contains what?

Answer 1

tubulin and dyenine (microtubules for axonal transport of molecules)

neurofilaments (structural support)

Question 2

resting potential of axonal membrane at what value?

Answer 2

-70mv

Question 3

what is RMP maintained by?

Answer 3

interaction of electrostatic attraction/repulsion & concentration

na/k ATPase pump (3na out for 2k in)

interior of axon, -ve charge
exterior = positive charge

Question 4

myelination

Answer 4

meylin is a phospholipid bilayer

sphingomyelin is the main phospholipid

CNS: oligodendrocyte (many neurone)
PNS: schwann cells (one neuron)

Question 5

synapse

Answer 5

structure that permits a neurone (or nerve cell) to pass an electrical or chemical signal to another cell (neural or otherwise)

Question 6

electrical synapses

Answer 6

faster conduction than chemical synapses.
gap junction

control unrefined compared to chemical synapses.

Question 7

chemical synapses

Answer 7

use chemicals to induce effect in the post synaptic neurone

Question 8

excitatory neurotransmitter

Answer 8

@ post synaptic neuron, when the neurotransmitter binds to the receptor, it causes transmitter-gated ion channels to open. If the potential changes at the axon hillock are +ve and large enough, an AP is triggered

Question 9

inhibitory neurotransmitter

Answer 9

if the potential changes are -ve the membrane becomes hyper polarised & no action potential is generated

Question 10

6 neurotransmitters

Answer 10

Glutamate (GLU)
GABA
Acetylcholine (ACh)
Dopamine
Noradrenaline & adrenaline
Serotonin