BIO 129 1st Edition Lecture 9 Outline of Last Lecture I. The CellA. Different types of cellsII. EnergyB. Cell types and their use of energyIII. Cell reproduction and divisionIV. Protein synthesis and degradationV. The cell membraneVI. Signals and receptorsOutline of Current Lecture I. Barriers in the bodyII. The lungsA. Gas exchangeB. BreathingIII. DiffusionIV. The SkinA. Many functionsB. Heat exchangeV. Digestive SystemVI. Functions of the Liver and KidneysVII. The LiverCurrent LectureThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.I. Barriers in the bodyA. Constant replacementB. Damage repairC. Immune protectionII. The LungsA. When skeletal muscles expand the chest, air is sucked into the lungsB. The lungs bring in oxygen (O2) and remove carbon dioxide (CO2) III. DiffusionA. Mother nature’s chaos ruleB. Everything goes from a high concentration, o a low concentrationC. Ex: Air-> high concentration of oxygen and a low concentration of carbonD. Gasses dissolve in waterIV. BreathingA. The brain must tell you to breathe every timeB. Brain controls how often the chest expandsC. Info In: H+ concentration, also acute stress overrideD. Info Out: motor nerves to diaphragm and intercostal musclesE. Autonomic nervous system: part of brain that controls opening and closing of airways and flow of blood to the lungsF. Parasympathetic: closes airways (calm times)G. Sympathetic: opens airways, increases blood flow (acute stress)V. SkinA. Largest organ of the bodyB. More skin cells than any other cellsC. Constant replacement (every 4 days)D. Maintains body temp.E. Heat exchange and water conservationF. We feel cold on a cold day because there is no hot blood flow to the brainVI. Digestive SystemA. Lipids digested in Small IntestineB. Proteins are broken down into amino acidsC. Absorption: taking the little molecules and ions into the bodyD. Immune protection in the intestinesE. Stomach: major digestionVII. The Liver and KidneyA. Liver: adjusting the molecular composition of the bloodB. Kidney: water and ion balanceC. Every molecule that enters the bod goes through the liverD. Liver has the first opportunity to store bloodE. Liver is first exposed to drugs and toxic compoundsF. Liver makes cholesterolG. Serum proteins and fats are made in the