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The fundamental excitable cell in the nervous system is the _____. - 🧠
ANSWER ✔✔neuron
The central canal of the spinal cord and the ventricles of the human brain
contain a filtrate of the blood, called _____. - 🧠 ANSWER ✔✔cerebrospinal
fluid
The knee-jerk reflex has sensory neurons arising in the _____,
interneurons in the _____, and efferent neurons that stimulate contraction