During the non-conducting state, the neuron membrane is permeable to the efflux of:
Correct answer: A. K+
- A. K+
- B. Na+
- C. Ca+
- D. Cl-
Explanation
During the non-conducting state (resting state) of a neuron, the neuronal membrane is primarily permeable to the efflux of potassium ions (K⁺). This permeability is due to the presence of potassium channels that allow K⁺ to flow out of the cell, contributing to the resting membrane potential, which is typically around -70 mV. The efflux of K⁺ ions occurs because of their higher concentration inside the neuron compared to the outside, leading to a net outward movement and a negative charge inside the neuron.
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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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