Neuron Communication Flashcards Preview

NESC 2570 > Neuron Communication > Flashcards

Flashcards in Neuron Communication Deck (8)
Loading flashcards...
1

Sensing pain

-pain is perceived by messages sent to the brain from injured areas
-anaesthetics block messages sent to the brain and from brain to muscle

2

Action potential

Brief electrical pulse that propagates along cells
-all our senses and thoughts and memories require action potentials

3

Nociceptors

-special neurons that detect painful stimuli in skin and body
-respond to stimuli in specific location

4

Receptive field

-area or region a sensory neuron can detect stimuli

5

Membrane potential

-Vm
-voltage difference between inside and outside of cell
-net charge inside vs outside
-how much energy is required to move a single positive charge across membrane into neuron

6

Motor neurons

-form synapses with muscles to tell them when to contract
-each release of a neurotransmitter by a motor neuron causes a twitch in muscle fibre

7

Botulinum toxin

-deadliest neurotoxin known
-paralyses entire system
-prevents release of NT from neuron

8

Lidocaine

-local anaesthetic that blocks pain sensation near injection site
-prevent nociceptor from releasing NT (so signal doesnt reach brain)