The plasma membrane is

permeable
semipermeable
rigid
around the nucleus

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 types of energy transfers and energy transportations are involved in the domino chain reaction?

Why do oceanic plates tend to subduction when colliding with a continental plate