1. 4 examples of functions that are maintained by homeostasis Concentration of oxygen and carbon dioxide  Oxygen serves as final acceptor for electrons removed in oxidative reactions  CO2: By-product of many reactions 2. pH of the internal environment 3. Concentration of nutrients , waste products, salts and other electrolytes 4.Volume and pressure of extracellular fluid 2. How does your body maintain homeostasis? By coordinating the activities of organ systems. 1. Exercise 2. Maintaining water balance 3. pH balance 4. Temperature regulation 3. What is sensory transduction? Stimulus (or change) is converted into an action potential (AP). Action potential is transmitted along axons towards the central nervous system (CNS) where it is integrated 4. When might the blood plasma be too acidic? We talked about 3 in class. Respiratory acidosis: decreased respiration causes increased blood carbon dioxide and decreased pH Carbon dioxide is produced constantly as the body burns energy; CO2 will accumulate rapidly if the lungs do not adequately dispel it Metabolic acidosis: Can occur if the kidneys are not removing enough acid from the body. Ketoacidosis: the body fails to adequately regulate ketones (bi-products of fatty acid breakdown, eg. acetone, acetoacetic acid) 5. When might vasodilation occur in the body? A. When you feel cold B. When you feel hot C. When you exercise a lot