Answer:
B
Explanation:
Facilitated diffusion because the transport channel proteins facilitate(help) the particle to enter the cell
Nitrogen wastes I think :)
The brain may send messages directly down nerve cells to the immune system. ... Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervous system regulates the speed at which food moves through the digestive tract.
Eukaryotic cells have membrane-bound organelles which carry out cell functions, a Nucleus which contain DNA from the cells and a cytoplasm which is similar to a jelly like fluid interior of the cell. It also has a cell membrane which is basically an outer boundary for the cell.
