Multiple choice general knowledge science & technology Which is the longest cell? Macroplasma gallisepticum Macroplasma Neuron Muscle cell Reveal answer Fill a bubble to check yourself C Correct answer Explanation Neurons (nerve cells) are the longest cells in the human body, extending from the spine to extremities. The claimed answer (C) is correct. 'Macroplasma' and 'Macroplasma gallisepticum' are not standard terms.