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Dendrite, cell body, and axon?
What is the structure of a neuron
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What is the nervous system made up of?
brain, spinal cord, and nerves
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What are nodes of ranvier and what does it do?
they are gaps in the myelin covering where the axon is exposed and it helps impulse travel quickly
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What are neurotransmitters?
Neurotransmitters are a chemical that allows nerve impulse to pas the synapse.
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What is the cerebellum?
It is the second largest portion of the brain. It regulates balance, posture, and movement. it stores info for repetitive moves
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What is a sensory neuron?
A neuron that sends info from sensory organs to interneurons
Found in PNS |
What are the two divisions of the nervous system?
central nervous system (CNS)-brain and spinal a cord and peripheral nervous system(PNS)-sensory and motor neurons
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What is the nervous system?
the nervous system recieves info and directs your body to respond it maintains homeostasis by directing your body to respond properly to the correct info it receives
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What is role of the brain?
The brain is the main processing center and it runs into the spinal cord. it is split into sections and each section has a job.
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What is the brain stems function?
the brain stem send info throughout the CNS and it leads to spinal cord. It controls involuntary movement
(Heart rate, body temp, sleep, hunger, etc.) |
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What is a motor neuron?
A neuron that sends impulse from CNS to muscles
Found in PNS |
What receives impulses form other cells?
Dendrite
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What sends messages through chemical and electrical signals and travels left?
nerve impulses
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What is the role of the spinal cord?
The spinal cord controls reflexes and sends and receives messages form the brain to parts of the body.
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A quick automatic response to stimuli involving sensory and motor neurons
What is a reflex and the neurons involved.
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What is an inter neuron?
An inter neuron connects the two neurons sensory and motor and is located in the brain or spinal cord
Found in CNS |
What is an axon’s function?
an axon sends messages to the next neuron by electricity (like passing in a line)
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Where are impulses transferred?
they are transferred between the axon tip of one neuron and the dendrite of the next
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What side of the brain controls what side of the body?
The left side of the brain controls the right side of the body and the right side of the brain controls the left side of the body.
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Why are reflexes so fast?
they are so fat because the brain doesn’t have to process it, the spinal cord does.
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What part of a neuron contains the nucleus and processes information?
the cell body
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What is the layer of fatty insulation that is covering bundles of axon to make impulses travel faster?
What is myelin
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What is the space where two neurons meet and electrical signals change to chemical?
what is the synapse
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this part of the brain is in charge of learning, memory, language, and intellect. This is the largest and most complex part of the brain.
Function of the cerebrum
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What are possible cause of paralysis and/or a concussion?
Concussion: bruised brain-headache, confusion, nausea
Paralysis:spinal cord injury-no movement one one side or all parts of body |
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