Which best describes where the scientists who have contributed to our scientific knowledge were located?
A. They were mostly from Europe.
B. They were mostly in the United States.
C. They were from all parts of the world.
D. They were from Asian countries.

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.

i believe the answer is a or 1