How does physical activity in maintaining a healthy weight? a. it raises cholesterol levels in the blood. b. it lowers the basal metabolic rate of the body. c. it decreases endorphin levels in the brain. d. it increases the amount of energy your body uses at rest.

Ana is a hospital researcher. she wants to preserve organs for further study in a chemical that is called formalin. prior topreserving the organs, ana wants to familiarize herself with the hazards of using formalin. ana should consult formalin'sa. materials safety data sheet.b. date of expiration.c. date of manufacture,d. additional laboratory uses,