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Chapter 23 - The Nervous System

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