Answer:
2 possible ones
Explanation:
Skin - Due to vasoconstriction and vasodilation
Brain - the hypothalamus regulates temperature
The answer is scientific question
It is mostly likely the cell membrane.
The cell membrane is a structure of a cell composed of double layer of lipids and proteins. It surrounds a cell and separates the cytoplasm from its surrounding environment. The cell membrane is selectively permeable (semi-permeable), which means that it only lets certain molecules enter and exit. It can also control the amount of some substances that go into or out of the cell.
Look up the symbol that it is pointing to and the name should pop up
