Please help with this science question!!

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

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems