Answer:
2) a feedback mechanism that regulates blood glucose level
i think the correct answer is B considering that the channels are not always open for the protons to freely diffuse through the inner membrane.
<span>It is usually the + strand and the - strand. It can be quite a bit more complicated.</span>
A group of atoms bonded together
A downhill skier traveling down a hill has a large amount of kinetic energy because of their mass and high velocity.