Polar bears are adapted to stay warm by growing thick fur. These organisms most likely live in a

cold environment

an arctic

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.

one would be wind another would be water density