Nervous System
The primary cell that builds all the structures of the nervous system
Name all structures of the entire nervous sytem
Brain, Spinal cord, and Nerves
what is the central nervous system made of?
brain and spinal cord
What does the Somatic divison of the nervous system conrol?
Voluntary movement of the body
what is the peripheral system made of?
nerves that branch off from the spinal cord.
what does PNS stand for?
peripheral nervous system
what does CNS stand for?
Central Nervous System
The division of your peripheral nervous system that is made up of the nerves that control involuntary body responses and functions.
Autonomic nervous sysytem
Name the tiiiiiiny empty space between dendrites of one neuron and axon terminals of the connecting neuron
Synapse
What is the sensory division of the PNS responsible for?
Sending impulses from the senses to the CNS
Two subdivisions of the Autonomic Nervous System--and the function of each
Sympathetic "Fight of Flight" Parasympathetic Division- "rest and digest"
Name FOUR Functional parts of a neuron
1- cell body (soma) 2- dendrites 3- axon 4- myelin sheaths 5- axon 6- nodes of ranvier
What structure functions like a highway and transmits nerve impulses from the body to the brain and from the brain to the body?
The spinal cord
The number of Na+ ions that are moved out by the Sodium Potassium Pump
3
This is the resting membrane potential
-70mV
The central nervous system is made of these organs
brain and spinal cord
What molecules send messages between two neurons?
Neurotransmitters
What are the 3 types of neurons?
Motor, sensory and inter neurons
What is the purpose of the Myelin Sheath on an axon?
to speed up nerve impulses
hyperpolarization
An action potential travels along this structure until it reaches the axon terminal
the Axon
The longest nerve is found in
blue whale
The channels that are always open
Leaky ion channels
The term to describe why feedback mechanisms exist
homeostasis
positive feedback