structure and function of neurones

Question 1

what is a motor neurone

Answer 1

carries action potential from cns to effector

Question 2

what is a sensory neurone

Answer 2

carries action potential from sensroy receptor to cns

Question 3

what is a relay neurone

Answer 3

joins sensory neurones to motor neurones

Question 4

what is a myelinated neurone

Answer 4

a neurone associated with schwann cells which make up a fatty layer called myelin sheath

Question 5

what is a non myelinated neurone

Answer 5

a neurone still associted with schwann cells, they are just loosely wrapped in one cell

Question 6

what are the advantages of myelinated neurones

Answer 6

transmit action potential quicker than non
can carry action potentials over long distances
rapid stimuli response

Question 7

what is an advnatge of a tightly wrapped myelin sheath

Answer 7

prevents ion movement across membranes ensuring movement only across nodes of ranvier, ensuring rapid transmission.

Question 8

what is the difference in cell body structure between motor and sensory

Answer 8

motor- cell body is in the cns, and long axon carries action potential to effector

sensory neurone- cell body is positioned outside the cns,
short axon carries action potential to cns