Integral proteins are embedded in the phospholipid layer, and can sometimes form protein channels that let ions and other small molecules through.
I think it is liqid but i dont know realy.
Lightweight beaks, heavy teeth, stability in flight
The right answer is The cells are damaged.
Take the example of skin cells.
The skin consists of two tissues:
* the outermost, the epidermis, resting on a vascularized connective tissue,
* the dermis.
In the epidermis, which includes several layers of cells, the outer layer is formed of dead cells that are desquamating and are constantly being replaced from proliferating basal cell cells. So, in normal conditions, the epidermis is in constant renewal.
On the other hand, when accidentally, the upper parts of the epidermis are damaged, for example, a slight abrasion or of a burn, the destroyed portion is regenerated (replaced) thanks to an accelerated proliferation of basal epidermal cells .
The X symbol looks too much like the multiplication symbol, it also makes using it as a variable more confusing.
