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GS Mod 16

Apologia Exploring Creation with General Science Module 16

QuestionAnswer
Neurons Nerve cells composed of dendrites and axons.
Synapse The point at which a signal from one neuron is passed to another neuron.
Neuroglia Cells that support the neurons and help communicate with one another..
Dendrites Conduct electrical signals towards the cell body.
Axons Conduct electrical signals away from the cell body.
Nerves Bundles of axoms that carry signals to and from the brain.
Central nervous system (CNS) Composed of the brain and the spinal cord. This is part of the nervous system that does most of the information processing.
Peripheral nervous system (PNS) Contains all the neurons involved in receiving information and sending it on to the spinal cord and brain.
Cerebrum Deals with the "higher-level" brain functions. These would include interpreting signals, learning, reasoning, and memory.
Gray matter Composed almost exclusively of the cell bodies of neurons.
Corpus callosum Allows the two hemispheres of the brain to exchange information.
Cerebellum Has many functions mostly oriented around muscle movements.
Brain stem It controls the more basic functions of the human body, such as breathing, heart rate, and the pressure at which blood is pumped through the body.
Autonomic nervous system The system of nerves which carries instructions from the CNS to the body's smooth muscles, cardiac muscle, and glands.
Sensory nervous system The system of nerves which carries information from the body's receptors to the CNS.
Somatic motor nervous system The system of nerves which carries instructions from the CNS to the skeletal muscles.
Sympathetic division Part of the autonomic nervous system that increases the rate and strength of the heartbeat and raises the blood pressure.
Parasympathetic division Part of the autonomic nervous system that slows the heart rate and lowers the blood pressure.
Papillae Tiny "bumps" you see on your tongue.
Taste buds Identify sweet, sour, bitter, and salty and umami.
Cornea Covered with a thin layer of clear tissue that is kept moist and clean.
Lens What the eye uses to focus the image.
Retina The part of the eye on which an image after it passes through the other parts of the eye.
Ciliary muscle A smooth muscle that changes the shape of the lens in order of adjust the focus.
Ear drum A thin sheet of tissue that vibrates as the result of vibrations in the ear.
Ossicles Tiny bones in the middle ear that move back and forth as a result of the ear drum vibrating.
Cochlea Snail=like shape that responds to the vibration of the ossicles by transforming it into electrical signal and sending it on to the brain to be interpreted as sound.
Created by: barbara.macri on 2012-11-17



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