produce an equation that could be used to calculate the population growth of a certain population (e. g a country's
population growth).

r = (b-d)/p

Explanation:

Net reproductive rate is (r)

Births is (b)

Deaths is (d)

Population is (p)

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.