The Nervous System

Complete the sentences:
The nervous system is made up of a complex network of cells called __________. All neurones have a ______ _______ with a nucleus (plus cytoplasm and all other organelles you usually find in a cell).

Complete the sentences:
The cell body has extensions that connect to other neurones - __________ and _________carry nerve impulses towards the cell body, and _______ carry nerve impulses away from the cell body

What are the 3 main types of neurones?

Describe the structure of sensory neurones

Describe the structure of motor neurones

Describe the structure of relay neurones

Outline the neural pathway from the stimulus to the response

Complete the sentence:
Sensory receptors act as ____________ (they convert the energy of stimuli into __________ impulses - nerve impulses)

What happens when sensory receptors are in their resting state?

What is resting potential?

What is generator potential?

What happens to the sensory neurone when a stimulus is detected?

TRUE OR FALSE:
A bigger stimulus excites the membrane more

What is an action potential?

What happens to a sensory neurone if a generator potential is big enough?

TRUE OR FALSE:
If the stimulus is too weak, an action potential could still be produced

What are Pacinian corpuscles?

Describe the structure of Pacinian corpuscles

How do Pacinian corpuscles work as mechanoreceptors?