Pls help me with this question

Which organelle releases chemicals that break down large food particles into smaller ones?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions