Biodiversity is (choose all that apply) only important to measure when the atmosphere is impacted.
an indicator of how healthy and well-functioning an ecosystem is.
the total number and kinds of species within an area.
not important to humans.

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.