CB2 the Nervous System Flashcards
What are the 2 parts of the human nervous system?
Central nervous system (CNS), peripheral nervous system (PNS)
What are the 2 parts of the central nervous system?
Brain, spinal cord
What are the 3 types of neurone?
Sensory, relay, motor
What travels through a neurone/axon?
Electrical impulse.
What is the purpose of the sensory neurone?
To transmit an electrical impulse from the receptor to the central nervous system
How does a signal pass from one neurone to another?
- synapse is a gap between neurones. 2. the elecctrical impulse stimulates the release of a neurotransmitter 3. the neurotransmitter diffuses across the gap 4. which stimulates an electrical impulse in the next neurone.
What is the function of a receptor?
Detect a stimulus
What are the 5 main types of stimulus?
Light, vibration, pressure, chemical, temperature
What is the order of neurones in a reflex arc?
Sensory, relay, motor
What type of neurone is attached to a receptor?
Sensory
What type of neurone is found in the central nervous system?
Relay
What type of neurone is attached to an effector?
Motor
What are the 2 types of effector?
Muscle, gland
What is the action of an effector called?
Response
What is the purpose of a reflex arc?
React very quickly to prevent harm
What is the gap between 2 neurones called?
Synapse
By what process do neurotransmitters travel across the synapse?
Diffusion
