The nervous system enables humans to react to their surroundings and to coordinate their behaviour. It comprises millions of neurones and uses electrical impulses to communicate very quickly.
What are three examples of conditions controlled by homeostasis in the body?
Blood glucose concentration, body temperature and water levels
Blood glucose, body temperature and nervous responses
Body temperature, nervous and chemical responses
What is included in the central nervous system (CNS)?
Spinal cord and all neurones in the body
Brain and all neurones in the body
Brain and spinal cord
What is the generalised order during a nervous response?
Receptor → stimulus → coordinator → effector → response
Response → receptor → coordinator → effector → stimulus
Stimulus → receptor → coordinator → effector → response
Name the three different types of neurone
Sensory, generalised and motor neurones
Sensory, relay and motor neurones
Sensory, relay and effector neurones
What moves across the synapse?
Electrical impulse and a chemical messenger
What three parts are contained in the brain?
Alveoli, cerebellum and medulla
Cerebral cortex, gall bladder and medulla
Cerebral cortex, cerebellum and medulla
What part of the eye controls the amount of light entering it?
Why does the pupil get smaller?
It is a reflex response and stops damage to the retina
We have to think about this and our brain then creates the change
To allow as much light into the eye are possible.
How has the different areas of the brain been mapped? - Higher
Studying brain damage individuals, to see what has changed
Studying brain damage individuals, electrical stimulation and MRI scans
Only by MRI scans
How do the different muscles in our eyes help us focus light clearly? - Higher
The muscles alter the size of the iris
The muscles control the images sent to the optic nerve
The muscles tighten or loosen depending on if the lens need to be thickened or made thinner