BTEC Applied Science- Neurones Review Questions and Answers

what do sensory neurones do carry nervous impulses from receptors into the central nervous system (CNS) what do motor neurones do carry impulses from the CNS to the effector organs What do relay neurones do? relay neurones are intermediate neurones they recieve impulses from a sensory neurone and relay them to motor neurones what are dendrites carries nervous impulses towards a cell body what is an axon carry nervous impulses away from the cell body what is the cell body where the nucleus is normally located what forms the mylein sheath schwann cells wrapped arounf the axon of a neurone what are gaps between adjacent schwann cells called nodes of ranvier why are most neurones in the centeral and peripheral nervous system are myelinated becausse fast transmission from the brain to muscles is often required what do mylein sheaths do insulate neurones increasing the speed of impulse transmission where are non myelinated neurones found autonomotic nervous system what is the autonomotic nervous system part of the nervous system that supplies the internal organs such as the stomach, intestine and kidneys what does the mylein sheath act as an electrical insulator because is is impermeable to ions (Na+ ans K+) what is saltatory conduction when the nervous impulse jumps f