GENERAL HISTOLOGY

Detailed explanation-1: -The surfactant reduces the surface tension of water by adsorbing at the liquid–gas interface. They also reduce the interfacial tension between oil and water by adsorbing at the liquid–liquid interface.

Detailed explanation-2: -Surface tension decreases as the intermolecular forces decrease. As the kinetic energy of the molecules is increased, the effectiveness of intermolecular attraction also decreases, and hence surface tension is decreased.

Detailed explanation-3: -The surface tension, , of the surfactant solution decreases with increase of the concentration of surfactant molecules in the system. The concentration of surfactants in the system, C, is defined as the total number of moles of the surfactant molecules divided by the total system volume. As C increases, decreases.

Detailed explanation-4: -It is established that pulmonary surfactant reduces surface tension at the air–water interface in the alveoli, thereby preventing collapse of these structures at end-expiration. In this manner, surfactant reduces the work associated with breathing.