The nervous system allows us to react to our surroundings very quickly and to coordinate our behavior. It comprises millions of neurones and electrical impulses pass along them 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 not go in a reflex arc?
The spinal cord
The peripheral nerves
What effect do stimulants like caffeine have on your reaction times?
What part of the brain controls balance and coordination of movement?
Which of these detects gamma rays?
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? - Higher
Thicker and fat
Long and thin
Short and thin