Which of the following is an exmaple of human impact on climate changes?

a) greenhouse effect
b) changes in solar output
c) global warming
d) changes in the tilt of earth's axis

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.