Cells and Control

What type of cells detect stimuli?

• receptor cells

• relay neurones

• muscle cells

In which sense organ would you find receptor cells that detect sound waves?

• the ear

• the nose

• the eyes

What are the electrical signals used in the nervous system called?

• impulses

• neurones

• sensors

In what order do the organs does an impulse go through to get from the hand to the brain?

• hand, nerve, spinal cord, brain

• nerve, spinal cord, hand, brain

• brain, spinal cord, hand, nerve

What are the two long ‘arms’ of a sensory neurone called?

• axon and drendron

• tron and bogon

• dendrite and cell body

In what order does an impulse travel through a sensory neurone?

• dendrite, dendron, axon, axon terminal

• dendron, dendrite, axon terminal, axon

• axon terminal, axon, dendron, dendrite

Why are sensory neurones so long?

• to carry impulses quickly over long distances

• they grow really fast

• there would be too many cells if they were short

What is the name of the fatty sheath that can surround dendrons and axons?

• myelin sheath

• fatty cells

• nodes of ranvier

What does the myelin sheath do?

• makes the impulses travel faster

• makes the impulses travel slower

• protects the neurone

An effector is part of the body that carried out a response due to a stimulus. Which one of these is an effector?

• muscle cell

• hair root cell

• red blood cell