Now, liver cells and kidney cells can undergo gluconeogenesis and they do actually undergo gluconeogenesis to a very large extent compared to other cells because other cells such as brain cells and muscle cells don't actually use gluconyogenesis, they only use it to very small extent under very extreme conditions. And in fact, we have cells of our bodies, such as red blood cells, that cannot use gluconyogenesis at all. And that's because red blood cells actually don't have mitochondria. And so red blood cells actually depend entirely on the glucose found inside the blood plasma, as do the brain cells and muscle cells of our body. So all these different types of cells actually get that glucose from the blood uptake that glucose and then use the glucose, break it down in glycolysis to form the ATP. And that's why it's so important that our liver cells and kidney cells can actually properly regulate the levels of glucose in our blood.