Please help whoever’s right I’ll give brainliest

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

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

Which could be a pathway of food through an ecosystem