AS Keywords Flashcards
(28 cards)
Central nervous system
Consists of the brain and spinal cord
Nucleus
Contains genetic material of the cell
Peripheral nervous system
Has two divisions which include the somatic and autonomic nervous system
Node of ranvier
Gaps that are present along the myelin sheath
Motor neurons
Neurones that can enable movement or action on muscles/ glands
Sympathetic
A branch of the autonomic nervous system that is activated when someone is active or stressed
Schwann cells
These cells make up the myelin sheath
Relay neurones
They send messages between sensory and motor neurones
Dendrites
Branch like structures that protrude from the cell body.
Brain stem
Part of the brain that controls breathing and heart rate
Somatic nervous system
The nervous system that transmits and receives messages from receptor cells in the sensory organs such as sight and hearing.
Axon
Carries the electrical impulse away from the cell body towards the synapse
Synapse
A small gap that exists between one neuron and the next
Autonomic nervous system
The nervous system that is automatic and self regulating and controls breathing and heart rate
Parasympathetic nervous system
The nervous system that is responsible for making us feel relaxed.
Neurotransmitters
Chemical messengers released from the vesicles of the presynaptic neuron.
Presynaptic neuron
Neuron that transfers from action potential
Action potential
Electrical nerve impulse that travels across the axon
Synaptic vesicles
Sacs holding neurotransmitters that found in the axon terminal
Axon terminal
The end of the presynaptic neuron, found at the end of the axon.
Post synaptic neuron
Neuron receiving action potential
Temporal summation
Large number of EPSP at the same synapse
Spatial summation
Large number of EPSP at different synapses
Summation
Calculation of EPSP and IPSP
