neurons and nervous coordination Flashcards
(20 cards)
what are the three types of neurons
motor
relay
sensory
what branch off the cell body
dendranites
what does the sensory neuron have and why
dendron as the cell body is in the middle of a axon
what covers the axon
myelin sheath
what is the myelin sheath made of
schwan cells
what is the lipid that helps the formulation of the mylien sheath
myelin
what are the gaps in the myelin sheath called
nodes of ranvier
give three differences between hormonal system and the nervous system
hormonal is slower,less specific, long lenth of response
nervous is faster,more specific, and a shorter length of response
what is the difference in type of message sent from hormonal nervous sytem and nervous system
hormonal- chemical
nervous-electrical
what is the transmission media of the hormonal system
in the blood stream
what is the transmission media of the nervous system
through neurons
what is the function of the cell body
contains all the genetic material and nucleus
what does the cell body contain lots of
RER
why is this important
protien syntheis
what is the function of the dendrons
conduct impulses towards the body
what is the function of the axon
bring impulses to other neurons
what is the function of the schwan cells
wrapped round axon for protection and insulation
what is a specilised propertie of the schwan cells
phagocytic
what is the function of the myelin sheath
insulatory
what is the function of the nodes of ranvier
gap in myelin sheath
