The most important ions present in the neurons and surrounding fluids are:
Correct answer: B. Sodium and Potassium
- A. Sodium and calcium
- B. Sodium and Potassium
- C. Calcium and Potassium
- D. Negative organic ions
Explanation
The most important ions present in neurons and the surrounding fluids are sodium (Na+) and potassium (K+). These ions play crucial roles in maintaining the electrical activity, signaling, and overall function of neurons in the nervous system.
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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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