Nervous System Flashcards
1
Q
What is the central nervous system?
A
- Brain
- Spinal cord
2
Q
What is the peripheral nervous system
A
All parts of the body
3
Q
Pathway of an electrical impulse through the nervous system for a conscious action.
A
Stimulus Receptor (sense organ) Sensory neuron Central nervous system Motor neuron Effector (muscle or gland) Response
4
Q
What is a receptor
A
-A nerve cell that detects the stimulus
5
Q
What is a neuron
A
A specialised cell that carries electrical messages around the body
6
Q
What is an impulse
A
An electrical message that is carried by a neuron
7
Q
What are reflex actions
A
Fast, automatic protective responses. They are involuntary. They do not involve the conscious part of the brain.
8
Q
Pathway of electrical impulse from a reflex action
A
Stimulus Receptor (sense organ) Sensory neuron Relay neuron in spinal cord Motor neuron Effector (muscle) Response
9
Q
How is an impulse carried across a synapse?
A
Neurotransmitters diffuse across the synapse and bind onto receptors on the motor neuron.
