The Nervous System Flashcards
What is stimulus?
Any change in your environment
Ex: light, sound, etc
What is the Central Nervous System?
The nerves connected to your brain and spinal chord
What is the peripheral nervous system?
The nerves that branch from the CNS to all parts of the body
What is an impulse?
An electrical message that Is carried along a neuron
What is the role of the sensory neuron
Carries a message from a sense organ to the CNS
What is the role of the motor neuron
Takes a message from the CNS to a muscle or gland
What is the role of the inter neuron
Connects sensory and motor neurons and carries messages within the CNS
What is the role of the cell body
Produce neurotransmitters
What is the role of dendrites
Fibres that receive information and carry it towards the cell
What is the role of the axon
Conducts impulses away from the cell body
What is the role of the schwann cell
Wrap their fatty cell membranes around axon, produce myelin sheath
What is the role of the myelin sheath
- Insulates neuron
- Speeds up transmission
What is the role of the nerve endings
Connects sensory neurons to receptor cells or sense cells
What is the role of the neurotransmitter swellings
Release chemicals that carry impulses from one nerve cell to another
What is a ganglion?
A group of cell bodies located outside the CNS