survival needs Flashcards
1
Q
nutrients
A
carbs - fuel for body cells
proteins - building cell structures
fats- fuel reserve
minerals and vitamins - req for chemical reactions
2
Q
oxygen
A
will die without
20% air we breathe oxygen
3
Q
water
A
60 - 80% body is water
most abundant chemical in body
provides environment for chemical reactions and base for secretions
4
Q
normal body temp
A
temp below 37 deg metabolic reactions become slower
too high chemical reactions faster and proteins loose their shape and stop functioning
death at either extreme
muscular system produces the most heat
5
Q
appropriate atmospheric pressure
A
the force that air exerts on the surface of the body
breathing and gas exchange in lungs depend on it
