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22 Cards in this Set
- Front
- Back
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axon
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long “tail” of a neuron
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dendrite
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little branches extending off of the cell body of a neuron that receives messages from other neurons.
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neuron
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nerve cell
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cerebellum
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part of the brain that coordinates body movement and balance
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cerebrum
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the largest part of the brain
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central nervous system
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brain and spinal cord. The skull protects the brain and vertebrae protect the spinal cord.
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cochlea
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snail-shaped, fluid-filled structure inside each ear that converts sound into impulses
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cornea
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clear protective covering of the eye that allows light in
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dermis
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the inner layer of the skin which contains blood vessels, nerves, sweat glands and hair follicles
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epidermis
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the outer, thin layer of skin
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medulla
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part of the brain responsible for controlling involuntary functions such as heartbeat and breathing
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optic nerve
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located at the back of the eye, this nerve carries signals from the eye to the brain
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reflex
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automatic, unconscious, split-second response to a stimulus; it involves spinal cord and nerves, but not the brain
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retina
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inner lining of the eyeball that is packed with light receptors (rods and cones)
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sclera
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the “white” of the eye or tough outer layer of the eyeball
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semicirular canals
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part of the inner ear that controls balance
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left hemisphere
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language, math ability, scientific skills, logical thinking, right-hand control
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right hemisphere
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artistic awareness, music awareness, imagination, left-hand control
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How many neurons in an adult human body?
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100 billion
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How do nerve impulses travel?
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Nerve impulses travel one way from axon to dendrite, only.
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How many cranial nerves are there, and where are they located?
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l12 pairs of cranial nerves are ocated at the base of the brain (remember looking for
them during the sheep brain lab) |
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How many spinal nerves are there, and where are they located?
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31 pairs of spinal nerves – branch off of the spinal cord
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