Answer:
Surfactant increases airflow. It has this effect on airflow because it reduces resistance to lung inflation. Airflow increased as predicted.
Explanation:
Pulmonary surfactant is a complex mixture of lipids and proteins secreted by the Type II alveolar cells. The major component of surfactant, dipalmitoyl-phosphatidylcholine (DPPC), is an amphiphatic phospholipid. The main function of the pulmonary surfactant is to reduce the surface tension at the air/liquid interface in the lungs by forming lining layer between the aqueous airway liquid and the inspired air. prevents alveolar and airway collapse at end-expiration and thus allows cyclic ventilation of the lungs. It decreases surface tension in the alveoli making it easier for the alveoli to increase surface area for gas exchange. By lowering alveolar surface tension, pulmonary surfactant provides two important benefits:
(1) it increases pulmonary compliance, reducing the work of inflating the lungs; and
(2) it reduces the lungs’ tendency to recoil, so they do not collapse as readily.
Answer:
D
Explanation:
People ar lonely in space!
A and B because the quote explains that large groups of people got together to form associations so A and B both make sense for the question
Answer:
The answer is B. conflict perspective.
Explanation:
This perspective is derived from Karl Marx's philosophy, who believed that society changes over time occur due to class conflict. In other words, people will compete for limited resources, such as food and money, and this competition benefits the rich in expense of the poor.
Conflict theory also states that the upper classes will attempt to maintain their power by any means necessary, usually by exploiting and opressing the working class.
