How do transport proteins that are pumps differ those that are channels

Channels, when they open, just allow the molecule to pass through. With a pump, it requires energy, and will move it in a certain direction. They move rapidly into the cell via protein molecules.

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explanation:

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.