Nerves

HideShow resource information
Acetylcholine
A neurotransmitter in both the CNS and PNS notably at the neuromuscular junction
1 of 24
Action Potential
Self propagating rapid depolarisation of a neuronal membrane, generated by voltage-gated ion channels
2 of 24
Biological transducers
Structures, notably sensory receptors, that convert physical or chemical stimuli into electrical or chemical signals which can be processed by the organism
3 of 24
Cholinergic Synapse
A synapse that releases acetylcholine
4 of 24
Electrochemical Gradient
The gradient across a membrane formed as a result of the movement of an ion or other solute
5 of 24
Motor Neurone
A nerve cell that carries impulses away from the central nervous system to an effector (muscle or gland). May be non-myelinated or myelinated
6 of 24
Myelin
A lipid-rich substance that surrounds and insulates the axons of some neurones
7 of 24
Myelinated Neurone
A neurone with an axon that is encased within a myelin sheath
8 of 24
Neuromuscular Junction
The site at which an axon terminal contacts a muscle cell
9 of 24
Neurone
A nerve cell, typically consisting of a cell body, dendrites and an axon
10 of 24
Neurotransmitter
A chemical messenger released by axon terminals in response to an action potential
11 of 24
Nodes of Ranvier
The gaps occurring at intervals along the myelin sheath
12 of 24
Non-myelinated Neurone
A neurone whose axon is supported by cytoplasmic extensions of oligodendrocytes rather than wrapped in a myelin sheath
13 of 24
Postsynaptic
A neurone on the receiving side of a synapse
14 of 24
Presynaptic
A neurone with an axon that is encased within a myelin sheath
15 of 24
Refractory Period
The period during a nerve impulse when the sodium channels are inactivated and the neurone cannot respond
16 of 24
Resting Potential
The potential difference across the cell membrane of a neurone when there is no impulse passing
17 of 24
Saltatory Conduction
The propagation of action potentials along myelinated axons by 'jumping' from one node of Ranvier to the next
18 of 24
Schwann Cells
Glial cells in the PNS which forms the fatty sheath around myelinated nerve fibres.
19 of 24
Sensory Receptor
A specialised cell that detects stimuli and responds by producing an electrical discharge
20 of 24
Sensory Neurone
A nerve cell concerned with transmitting impulses from sensory receptors to other neurones
21 of 24
Stimulus
Any physical or chemical change in the environment capable of provoking a response in an organism
22 of 24
Synapse
The junction between two neurones or between a neurone and an effector
23 of 24
Synaptic Integration
The interpretation and coordination of inputs from many neurones by a single neurone resulting in the production of a new signa.
24 of 24

Other cards in this set

Card 2

Front

Action Potential

Back

Self propagating rapid depolarisation of a neuronal membrane, generated by voltage-gated ion channels

Card 3

Front

Biological transducers

Back

Preview of the front of card 3

Card 4

Front

Cholinergic Synapse

Back

Preview of the front of card 4

Card 5

Front

Electrochemical Gradient

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes and structure resources »