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29 Cards in this Set
- Front
- Back
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What are the major components of the nervous system |
Brain, spinal cord & neurons |
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What are the three types of neurons? |
Interneuron's, sensory neurons, and motor neurons |
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What is and what does the brain do? |
Made up of millions of neurons Weighs 1300g Type tells you what the animal can do Receives information from the body and environment and directs a response The brain requires enormous amounts of energy and oxygen |
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What is and what does the spinal cord do? |
A large collection of nerves covered in fat The spine makes up the reflex arc |
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What are somatic nerves |
Nerves under your control Sensory neurons and motor neurons |
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What are sensory receptors? |
Receptors that receive information from the 5 senses and sends it to the spine |
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What are the types of sensory receptors |
Thermo receptors Chemo receptors Photo receptors Auditory receptors |
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What are motor neurons |
Neurons that are connected to muscle tissue and carry messages from the brain / spine to the muscles |
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What are the parts of the central nervous system |
Brain and spinal cord |
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What are the parts of the peripheral nervous system |
Somatic nerves & autonomic nerves |
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What are autonomic nerves |
Nerves not under your control but you can influence them |
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What are the two types of autonomic nerves |
Sympathetic and parasympathetic |
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What are sympathetic nerves |
The on switch that controls the fight or flight Makes heart race, eyes widen, tenses muscles and sky rockets blood pressure Supplies blood to liver |
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What are parasympathetic nerves |
The off switch that calms you down. You can calm yourself down / grounding technique |
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What is ptsd |
Post traumatic stress disorder. Parasympathetic and sympathetic don't work properly together |
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What are Neurons? |
Neurons are cells that make up nerves, spinal cord and brain tissue Neurons are the only cells that are capable of carrying an electrochemical charge |
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How big are neurons? |
Some are microscopic and some are almost 1m in length. (from top of spinal column to big toe) |
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What are Dendrites? |
An extension of cytoplasm that receives a message from another neuron and sends it to the soma ( cell body) |
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What is the Soma |
Cell body. Area of neuron that houses all organelles to keep cell alive. Also contains the nucleus and DNA |
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What is the axon |
Long extension of cell that creates and sends messages / transmits nerve impulses |
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What is the myelin sheath |
A fatty, waxy coating that helps protect the neuron |
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What is the Schwann cell? |
Small cell that makes the myelin sheath |
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What is the node of Ranvier |
Section of axon that lacks the myelin sheath |
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What is the Neuriliemma? |
Allows neurons to grow back together. Fatty coating that surrounds most neurons and helps neuron to repair itself ( except grey matter in brain ) |
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What do Pain receptors do? |
Pain receptors signal when you may be doing damage to the body . tells the spinal cord and it makes the decision to move |
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What is the Reflex Arc |
A very fast pathway that helps protect the body. Messages go from receptor > spinal cord > muscle & makes body part move > to brain |
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What can your brain do to senses? |
The brain can fool your senses. Can amplify, create and shut off (except sight) |
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What is Hibituation |
When the brain processes the same boring information so it shuts it out. (except sight) |
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What are thoughts |
Neuron behaviours |
