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Chapter 23 - The Nervous System

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Across
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These types of neurons cause muscles or glands to respond
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The extension of a neuron that receives nerve impulses
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This 'sheath' helps to protect axons and increase transmission speed
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Controls the pituitary, involuntary activities, and some emotion/appetite
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Middle layer of the eye, provides nourishment
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A chemical that is released from the axon over the synapse to a dendrite
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The membranous coverings of the CNS
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The nervous system that controls your involuntary actions
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This photoreceptor cell helps you see color
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The junction between two neurons
Down
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The extension of a neuron that transmits nerve impulses
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This electrolyte rushes into the cell during a nerve impulse
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The fluid found in the CNS
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Receives sound waves, snail-shaped
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This photoreceptor cell helps you see in the dark
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The name of the membrane commonly referred to as the ear drum
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Controls involuntary activities only and coordination
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The basic unit cell of the nervous system
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The charge of the inside of the membrane of a neuron at rest
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These receptors sense cold, heat, pain, pressure, and touch in your skin