In an action potential, the permeability of sodium ions in the neuron increases due to:
Correct answer: C. The opening of sodium channels/gates
- A. Repolarization
- B. The action of the acetylcholinesterase enzyme
- C. The opening of sodium channels/gates
- D. Sodium ions forming an ionic bonding
Explanation
In an action potential, the permeability of sodium ions increases due to the opening of sodium channels or gates in the neuron's membrane. This allows sodium ions to flow into the neuron, leading to depolarization and the initiation of an action potential.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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