When something needs to be transported against its concentration gradient, or a molecule is too big to simply diffuse through a membrane, active transport has to be used. So active transport requires energy (ATP).
Examples:
1. Antiport pumps: transport one substance in one direction while transporting another substance the other way. An example of this is the sodium-potassium pump.
2. Symport pumps - uses a substance that wants to move from an area of high concentration to low concentration and carries another substance against its concentration gradient. An example of this is the sodium-glucose transport protein
3. Endocytosis - large amounts of extra cellular fluid can be taken into a cell - needs ATP to bind proteins in the cell membrane and causes them to change their shape...which eventually causes the surrounding of the fluid to be brought in (a vesicle).
4.exocytosis - opposite of above
I think it's the home health aide, because they can be there to see when and what medicane is given. The client could be too sick to write, and the physician isn't always there. And the nurse sees so many other patients to have enough time. I think it's the home health aide.
Answer:
The answer is Kingdom .
Explanation:
Kingdom is place the highest in the level of classification .
Answer:
c
Explanation:
a b and c are all signs of life but energy can be in objects not just life.
Because all those energy sources are natural and will always be there, when ever there is a need for extra energy.
