Answer: D
i hope this helps and have a wonderful day!!
Traveling, change, and falling in love are all considered good stress. Good stress can turn into bad stress. Good stress can also motivate you and keep you going, but if you no longer feel motivated then the good stress can change to bad stress and cause problems.
Answer:
b. It keeps alveoli from collapsing with breaths.
Explanation:
Surfactants are highly surface active agents which are formed from a protein and lipid complex. It comprises of a hydrophobic and hydrophilic portion and its sole purpose is to control the tension at the air-liquid interface and thereby lower the surface tension. Surfactants are produced by the type II aveolar pneumocytes in the lungs.
Surfactants are needed in order to aid breathing and prevent straining oneself, it also prevents the lungs from collapsing during breathing, a term known as atelectasis.
He could develop sickness as to a bad cold. His bones will then become fragile.
