Which of the following increases when an action potential is initiated?
Correct answer: A. Diffusion of sodium ions into neuron
- A. Diffusion of sodium ions into neuron
- B. Diffusion of sodium ions out of neuron
- C. Diffusion of potassium ions out of neuron
- D. Diffusion of potassium ions into neuron
Explanation
When a neuron is stimulated by a threshold stimulus, it causes the opening of sodium voltage regulated gates. As a result sodium gates permits the influx of sodium ions by diffusion.
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About Coordination and Control
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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