Lesson 2 - Neurones

Question 1

What are neurones

Answer 1

-they are specialised cells whose function is to move electrical impulses to and from the CNS, so caries neutral info throughout the body
-neurones must transmit info both within neurones and from one to the next

Question 2

What is the structure of a neurone

Answer 2

-consists of cell body, dendrites and an axon
-dendrites at one end of the neurone receive signals from other neurones or sensory receptors
-impulses carried along axon to end of nerve where an action takes place

Question 3

What is a sensory neurone

Answer 3

-they carry nerve impulses from sensory receptors to the spinal cord and brain
-convert info into nerve impulses and when this reaches the brain it translates into sensations

Question 4

What is a relay neurone

Answer 4

-middle man which allows sensory and motor neurones to communicate

Question 5

What is a motor neurone

Answer 5

-located in CNS and indirectly controls muscle actions
-when stimulated, release neurotransmitter that bind to receptors on muscle and cause muscle movement