Responding To Change Flashcards
What does your nervous system send around your body to allow you to react to your surroundings quickly?
Electrical impulses down your neurones.
What does your nervous system do?
Enables you to react to your surroundings and co-ordinate your behaviour.
What are hormones and what do they do?
They are chemical substances that control many processes going on inside your body.
What are examples of sense organs?
Ears
Eyes
Skin
Nose.
What are stimuli and what are they picked up by?
They are changes in the environment picked up by receptors.
What is the difference between a nerve and a neurone?
Hundreds and thousands of neurones make up a nerve.
What is your central nervous system made up of?
Your brain and your spinal cord.
How does yoUr nervous system actually work?
When a stimuli is detected by your sensory receptor a electrical impulse is sent down your sensory neurone to your CNS where the information is coordinated. It then sends the electrical impulse down your motor neurone to your effecter organ to respond to the change.
What are reflexes?
An automatic response (eg your hand pulling away when you touch something hot.
What two things are reflexes for?
To protect you and to take care of your bodily functions like breathing.
What three types of neurones do your reflexes involve?
Sensory
Relay
Motor.
What are synapses?
Junctions between nerves.
How do reflexes work and what do we call the process?
Am electrical impulse travels down your sensory neurone to your CNS where the information is co-ordinated then it passes along a relay neurone and back up a motor neurone to a effector organ.
We call this a reflex arc.
How do electrical impulses cross the synapse?
The impulse arrives at the neurone and chemicals are released into the synapse then the chemicals attach to the next neurone and sets up a new electrical impulse.
