In what type of cells would you expect to find a lot of mitochondria?

You would expect to find many mitochondria in a muscle cell. This is because the mitochondria makes the energy fo a cell, and muscle cells need alot of energy to do their job. The more energy a cell needs to do its job, the more mitochondria it has.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.