Which is the correct pairing of a vitamin and its function?
a. vitamin D – visual pigments
b. B vitamins – make collagen
c. vitamin A – increases calcium uptake
d. vitamin C – protecting cell membranes
e. vitamin K – blood clotting

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Which locations on the map are low-pressure areas? a b c d e

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?