Match the symbols used in electric circuit diagram to their functions

1st Def: 4th Pic

2nd Def: 3rd Pic

3rd Def:  1st Pic

4th Def: 2nd Pic

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.