Nervous System 1
The primary cell that builds all the structures of the nervous system
•The very narrow gap (only about 2 millionths of a centimeter wide) between neurons. It’s filled with a supportive extracellular matrix that keeps the structure in place.
What is the synaptic cleft?
Common stimuli for nerve impulses? (list 3)
Pain, temperature or touch
What does the Somatic divison of the nervous system control?
Voluntary movements of the body
What is the peripheral nervous system made of?
Nerves that branch off from the spinal cord.
What is an area of skin supplied by a single spinal nerve?
Dermatone
Which lobe is Broca's area located in?
Frontal lobe
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 tiny empty space between dendrites of one neuron and axon terminals of the connecting neuron
Synapse
Name the function of the neurotransmsitter Adrenaline
Stress response, fight or flight, excites nervous system, fear response
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 terminals (Nerve endings) 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
What does a dendrite do?
Receives neurotransmitters from another neuron's axon terminal
Part of the brainstem that is located above the medulla and in front of the cerebellum and helps regulate breathing rhythm and plays a role in sleep and arousal
The pons
The central nervous system is made of these organs
brain and spinal cord
What does an axon terminal hold inside small vessicles?
neurotransmitters
Name three neurotransmitters
Endorphines, serotonin, dopamine, GABA, Acetylcholine
What purpose is the purpose of the Myelin Sheath on an axon?
to speed up nerve impulses and transmit them neatly
Neurons taking information back to your body are called what?
Motor neurons
The messages travel along this structure until it reaches the nerve terminals
the Axon
Explain what happens to an action potential (message) when it reaches the axon terminal
It changes to a chemical signal, and releases neurotransmitters that are received by the next neuron across a space called a synapse
Name the gaps between the myelin sheaths on the axon
Nodes of Ranvier
Name the lobes of the brain
Frontal, parietal, temporal ,occipital
Which ion stimulates neurotransmitter secretion
Calcium