Scientist believe that the function of a hiccup in the human body could be all of the following except for:

a

to stop us from bringing water into lungs

b

to nursing infants to clear air from their stomachs

c

a leftover reflect from when our ancestors had to pump water over their gills

!

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper