Name at least two organelles that you would expect to be abundant in the cytoplasm of these cells. For proper functioning of the cell it is important that each cell be maintained within a narrow range of values. The existence of this relatively constant environment is called homeostasis. One of the ways that homeostasis is maintained is through the use of negative feedback systems. Describe a possible alteration in homeostasis and give an example of a negative feedback system that would resist this alteration.
Epithelial tissues provide several functions within the body.
In the kidney, glucose moves from the urine into the cells that make up the kidney tubules and passes through these cells into the blood. Explain your answer.