During conduction of nerve impulse

During conduction of nerve impulse, Na+ moves into the axoplasm. Axoplasm is a jelly like substance that contains both inorganic and organic matter in a axon. For an inactive neuron, the axoplasm has an overall negative charge. This is because proteins, amino acids, phosphates, and other negatively-charged entities inside the cell cannot cross the selectively permeable cell membrane. Two types of positively charged ions, potassium (K+) and sodium (Na+), can cross the cell membrane through selective ion channels. Normally there are more potassium ions inside the cell than outside, whereas there are more sodium ions outside the cell than inside.