1. Name five movements that are voluntary.

2. Name five movements that are involuntary.

3. Explain why it is possible for you to extend your arm all the way, and then curl it right back up toward your body, if muscles can only pull?

4. Explain how muscles “know” they are supposed to move?

5. About how many muscles do you have in your body?

10. what is one long-term effect of tobacco use? changes in brain chemistry coronary heart disease decreased appetite increased heart rate

Select all of the possible methods of aids transmission.

Life expectancy in the united states is (76.4 for men and 81.1 for women). life expectancy is not the same as healthy life expectancy. healthy life expectancy is the number of years a person is expected to live in this number is obtained by subtracting years spent in poor health from overall life expectancy. the world health organization (who) calculates healthy life expectancy in 194 countries. the united states ranks twenty-ninth in the world using this measurement, with an average of of healthy life expectancy. singapore ranks number one (76 years), and japan is number two (75 years).