Imagine trying to assemble a jigsaw puzzle one piece at a time without knowing what the final picture will be. To accomplish this task, you would work with the individual pieces to build the image using

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

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis