Flashcards in Nerves Deck (18):
What is the purpose of dendrites?
conducts impulses towards cell body
Whats the purpose of an axon?
Transmits impulses away from cell body
What does the cell body contain?
Describe motor neurone
Spinal cord - Impulses from CNS to effectors
Describe sensory neurone
Cell body coming off of axon, PNS
Sensory cells to CNS
Describe relay neurone
Cell body in axon
What do schwann cells do?
wrap around axon creating insulating layer called myelin sheath
What are the gaps between schwann cells?
Nodes of Ranvier
Bundle of axons of many neurones that transmits impulses to the brain or spinal cord
What is grey matter made of?
cell bodies, synapses and dendrites
What is white matter made of?
What is the definition of a receptor
Detect stimuli and send impulses to CND
Tissue that responds to a nerve impulse or hormone
pattern of behaviour involving a rapid response to stimulus
Describe pupils constricted
Radial muscles relax and circular muscles contract
Describe pupils dilated
Radial muscles contract and circular relax
Describe the stages of impulses
Receptor, sensory, relay, motor, effector resposnse