answer:
♡ amplify means to make something stronger, bigger, louder or more important.
♡ impulse is a strong urge or unexplainable urge.
♡ a membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles.
♡ molecules, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
♡ produced is a verb form of the word produce.
♡ stimulate is to excite, to invigorate or to spark someone's interest. an example of stimulate is when you spark the growth of a plant by giving it plant food.
♡ volume is the degree of loudness or the intensity of a sound.