Answer:
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Answer:
because the sodium channels have a refractory period following activation, during which they cannot open again and it ensures that the action potential is propagated in a specific direction along the axon.
Answer:
Optic nerve, optic tract, optic radiations
Explanation:
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Answer:
The growth hormone/IGF-1 system stimulates both bone-resorbing and bone-forming cells, but bone formation is the dominant effect, resulting in increased bone mass. Thyroid hormones boost the energy production of all cells in the body, including bone cells.
