Sodium ions are_folds higher in concentration outside than inside the memberane surface of nerve cell:
Correct answer: D. Ten
- A. Three
- B. Five
- C. Seven
- D. Ten
Explanation
Sodium ions (Na+) are approximately 10 times higher in concentration outside the membrane surface of a nerve cell compared to inside. This concentration gradient plays a critical role in generating and propagating action potentials, which are the electrical signals that allow nerve cells to communicate with each other and transmit information along neural pathways.
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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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