Answer:
Type Il cell.
Explanation:
Surfactant may be defined as the chemical that decreases the surface tension between the lungs. Pulmonary surfactant is the thin layer of fluid that increases the efficiency of gas exchange.
Type II alveolar cells of the lungs produces the surfactant. Lipida and proteins are the major constituent of the surfactant produced in the lungs. The surfactatnt is important for maintaining the integrity of alveoli.
Thus, the correct answer is option (e).
Biosphere is one of the four sub systems of earth. It contains all the living things in the planet. So, plants and animals, as well as microorganisms are part of the biosphere. Humans can also be part of the biosphere according to some scientist, but others put them in another sphere - anthrosphere.
