Where do we see animals being aggressive towards eachother?

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

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

How does the nervous system affect the excretory system?