Which of the following is not positively influenced by physical activity?
a.
cardiovascular disease
b.
obesity
c.
osteoporosis
d.
allergies

The correct answer to this question is D. Allergies. Doing physical activities will not positively influence an allergic reaction or prevent allergies, this can only be done with prescribed or over-the-counter medication that needs to obtained from a drug store.

The hawk receives 0.1% energy from the caterpillar although the caterpillar gets eaten by another bird smaller than the hawk first

Na+ loss through sweet plus the dilution has lowered na+ concentration outside of neurons, altering the na+ equilibrium potential. sodium exists more outside the cells than inside. when na+ is lost by sweat plus the dilution( because they drink a lot of water) changes the concentration outside the cell, forcing the water to enter the cell and attempt to balance the concentration inside/outside.the problem is that the abundance of water will cause the cells to swell. most cells can adapt, however, the brain cells can't that's why the runner has confusion and can't control the muscles.  if not treated and this occurs in less than 48 hours, it can be immediately fatal .