Answer:
The Cell Membrane.
Explanation:
To enter or leave a cell, the substance must pass through the cell membrane. (plasma membrane)
The answer is to your question is A
Answer:
brainly me
Explanation:
When we get too hot: Sweat glands in the skin release more sweat. The sweat evaporates , removing heat energy from the skin. Blood vessels leading to the skin capillaries become wider - they dilate - allowing more blood to flow through the skin, and more heat to be lost.