AU BUT one describes an effect of aging on the respiratory system. es 0)
A)
diminished lung volume capacity
B)
increased respiratory mucus production
decreases in respiratory muscle strength
D)
oxygen content of arterial blood decreases

Sometimes without even knowing it, people waste fresh water. write an editorial for our school newspaper. try to convince your readers that saving and recycling water should be something they do every day.

True or false. mucous membranes secrete mucus that traps pathogens.

Thinking about and listing ones options in the process of decision-making include all of the following except a. identifying possible alternative outcomes b. predicting what friends will think c. determining what is most important d. thinking about what choices could be made