1) Variables that are not or cannot be controlled that could interfere with an experiment are called . A. controlled variables
B. extraneous variables
C. dependent variable
D .control group
E. independent variable

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

What is the primary function of the nervous system?

This is the process of making a prediction based on the results of prior observations of similar events.