Explanation:
a) This is a retrospective observational study.
b) This is an appropriate choice due to the rareness of MS.
c) The subjects were US military personnel, some of which had developed MS.
d) The variables were the vitamin D blood levels and whether or not the person developed MS.
The false one would be the first because aerobic exercise is carried out for a substained period of time, and doing requarly can eliminate the risk of heart / lungs
Answer:
the Epiglottis prevents food or liquids from entering the lungs.
Explanation:
when you swallow it covers the enterance to the lungs. Hope this helps :)
With your hand securely on the safety/gait belt (palm up), walk beside or slightly behind the resident on the involved side.
