It would be a catalyst. They help increase the rate of chemical reactions.
Answer:
Spongy bone
Explanation:
The bone density is reduced and allows the end of bones to compress when stress is applied
The endoplasmic reticulum serves many general functions, including the folding of protein molecules in sacs called cisternae and the transport of synthesized proteins in vesicles to the Golgi apparatus.
"Energy transmitted as sound waves" is the correct answer. If you have trouble remember, just think of an acoustic guitar, which sends this energy out every time a string is plucked.
