If many chemical messengers that control body functions are proteins, then what are many chemical messengers that control body functions? Answer choices: - gasses - photons - acetic acid - flames - heat or cold - chemical waste - proteins - sweating
proteins

If insulated material can be used for keeping heat, then how can heat be kept? Answer choices: - an electric stove - exposed material - insulated material - hydration - permeable material - electricity - wet material - In the winter
insulated material

If hormones produced at the base of the brain control other endocrine glands, then hormones produced at the base of the what control other endocrine glands? Answer choices: - proteins - organ - fats - animals - synapse - humans - brain - Man
brain

If lung cancer is often caused by exposure to cigarettes and cigars, then what kind of cancer does exposure to cigarettes and cigars often cause? Answer choices: - lung - UV - foot - damage - skin - death - breast - harm
lung