Nervous System 1
The primary cell that builds all the structures of the nervous system
Neuron
what does CNS stand for?
Central Nervous System
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 does PNS stand for?
peripheral nervous system
The central nervous system is made of these organs
brain and spinal cord
What is the largest part of the brain?
The cerebrum
The division of your peripheral nervous system that is made up of the nerves that control involuntary body responses and functions.
Autonomic nervous sysytem
Double Jeopardy
Name the tiny empty space between the dendrites of one neuron and axon terminals of the connecting neuron
Synapse
what does the peripheral nervous system consist of?
12 pairs of Cranial nerves
31 pairs of Spinal nerves
Two subdivisions of the Autonomic Nervous System--and the function of each
Sympathetic "Fight of Flight" Parasympathetic Division- "rest and digest"
Name all structures of the entire nervous sytem
Brain, Spinal cord, and Nerves
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
When is the sympathetic nervous system is most active?
When responding to stress or danger
What does ALS stand for?
Amyotrophic Lateral Sclerosis (Lou Gehrig's Disease)
What are the cavities and hollow spaces in the brain?
Ventricles
What is the chemical messenger that carries signals between neurons?
neurotransmitters
What portion of the brain contains the medulla oblongata?
The brain stem
What purpose is the purpose of the Myelin Sheath on an axon?
to speed up nerve impulses
Neurons taking information back to your body are called what?
motor neurons/Efferent neurons
An action potential travels along this structure until it reaches the axon terminal
the Axon
Double Jeopardy
Name FOUR Functional parts of a neuron
1- cell body (soma) 2- dendrites 3- axon 4- myelin sheaths 5- axon terminals 6- nodes of ranvier
What illness causes a high fever, headaches, back and neck pain and stiffness, nausea and vomiting, delirium, convulsions and could lead to coma and death?
Meningitis
What does a dendrite do?
Receives neurotransmitters from another neuron's axon terminal
There are approximately how many neurons in the human brain?
86 billion