A nerve cell that carries information back and forth from the environment and the central nervous system is a A. Reflex
B. Gland
C. Medulla
D. Neuron

ocean expansion, global warming is melting icebergs and causing water levels to rise.

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.