It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. The cells that release ATP when a ligand binds to its membrane receptor, and in which sense are these cells involved is this: <span>Cones; vision. Hope this helps.</span>
Answer:
The answer to the question is D
Answer: the upper epidermis
Explanation: It helps protect the leaf by aiding in preventing water loss and providing an extra layer between the outside and inside of the leaf
