The nervous system enables humans to react to their surroundings and to coordinate their behaviour. It comprises millions of neurones, and it uses electrical impulses to communicate very quickly.
What type of cells start electrical impulses along nerves?
What part of a nerve cell insulates the electrical signal?
What is the gap between nerve cells called?
What neurones carry signals to effectors?
Where do electrical signals go in a reflex arc?
The spinal cord
What effect do stimulants like caffeine have on your reaction times?
What part of the brain controls balance and coordination of movement?
What is the function of the cornea?
Contains the receptors
Controls how much light enters the eye
What shape is the lens in an eye if a person is looking at a near object?
Short and fat
Long and thin
Short and thin
Which of these detects gamma rays? - Higher