Lactic acid is a byproduct of aerobic respiration.
True
O False

True

Explanation:

that's what can build up in your muscles that cause cramps and that is when you don't get enough air going quickly enough around your body.

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.