Examlex
Which of the following increase the rate at which chemical reactions occur without undergoing a change themselves?
Meninges
The three layers of protective tissue (dura mater, arachnoid mater, and pia mater) that cover the brain and spinal cord.
Central Canal
A fluid-filled channel in the center of the spinal cord, part of the central nervous system's cavity.
Excitatory Signals
Neural impulses that increase the likelihood of a neuron firing and transmitting its message to another neuron.
Inhibitory Signals
Chemical or electrical signals that decrease the likelihood of a neuron firing, thus reducing the activity of neural circuits.
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