What prevents food or liquids from getting into the lungs

Why is it so important to have a lifetime commitment to training? a-it takes your entire life to become fit b-it keeps you from becoming bored c-you will lose strength and endurance once you stop exercising d-it increases your motivation in life

In a two to three page paper, examine the history and development of the healthy people initiatives. discuss some of the successes and shortfalls of the three initiatives thus far; including healthy people 2000, healthy people 2010, and healthy people 2020. be sure to include statistical data from the initiatives to support your position. don't forget to cite your sources.

During polarization,potassium has a blank charge,sodium has a blank ch arge ,and calcium has a b l ank. charge