In humans a gene that has been identified as causing a type of skin cancer is the
The environment and the inside of the cell will have the same concentration. If the cell is placed in a solution of a less sucrose solution, the water will get into the cell making it bigger in size. The movement of the water is from a portion of lower concentration to a portion of higher sucrose concentration.
Humans ferment lactic acid in muscles where oxygen becomes depleted, which is why sometimes if you finish a run and don't stretch soon you have have discomfort. <span />