Answer:
When the molecules are too large.
Explanation:
Facilitated diffusion refers to the passive transport of substances down the concentration gradient via specific transport proteins present in the membrane. The large, polar, charged substances and ions cannot pass through the small spaces present between hydrophobic tails of membrane phospholipids. The transport proteins transport these substances in energy independent manner.
False. It's not even barely understood.
Increased heart rate,Increased thirst, and increased salt hunger.
Good luck! (:
What seems to fit in the blank would be "offspring,'' but that wouldn't be true.
The answer would be letter B.
