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Describe the chemical and electrical properties of an action potential. In your answer, describe the movement of Na⁺ ions and K⁺ ions across the cell membrane and the resulting changes in electrical potential.
Peristalsis
The wave-like muscle contractions that move food through the digestive tract.
Cerebrospinal Fluid
The clear, protective fluid circulating around the brain and spinal cord.
Hydrocephalus
A condition characterized by an abnormal accumulation of cerebrospinal fluid within the cavities of the brain, which can cause increased pressure and swelling.
Meningitis
An inflammation of the protective membranes covering the brain and spinal cord, a condition that can be life-threatening.
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