1. 1. Chemical 2. Cellular 3. Tissue 4. Organ 5. Organ System 6. Organismic Human Body Organization

2. Chemical Bonds A union between the electron structures of atoms Atoms can have several orbiting shells that hold their electrons the innermost shell holds a maximum of 2 electrons the outer (or valence) shells can hold up to 8 electrons If the outer shell is complete then the atom is not reactive If the outer shell is not complete then the atom is reactive It tries to fill its outer shell with the electrons from other atoms This is the basis of Chemical Reactions and Chemical Bonds There are three type of Chemical Bonds in the Human Body Ionic Covalent Hydrogen

3. Ionic Bonds

4. Covalent Bonds

5. Hydrogen Bonds

6. Macromolecules Are Giant Molecules of Life All Use Carbon Atoms Carbon has only 4 outer shell electrons can make 4 covalent bonds excellent for building molecules hydrocarbons carbon and hydrogen combinations functional groups attachments to carbon backbone increase diversity monomers small molecules that form polymers polymers large molecules made up of monomers

7. Dehydration Synthesis

8. Hydrolysis

9. Metabolism all the chemical reactions by which cells use and acquire energy. Anabolism: involves building of complex molecules from simple molecules this requires energy Catabolism: involves the breaking down of complex molecules into smaller ones this process results in the acquisition of energy in the form of adenosine triphosphate or ATP Cellular Metabolism (Cellular Respiration) : how each cell transfers glucose and oxygen into ATP

10. ATP (Adenosine Triphosphate)

11. Glucose Regulation Pancreas

12. Pancreatic Cells

13. Pancreatic Cell Physiology Glucagon Insulin

14. Glucose Triggers Insulin Release Glucose enters cell And generates ATP ATP Closes K + channels And opens Ca ++ channels Ca ++ untethers Insulin Allowing Insulin Release Pancreatic Beta Cell

15. Mitochondria Anatomy Inner Compartment Outer Compartment Inner Membrane Outer Membrane Cytoplasm Cristae

16. Cellular Respiration - Summary Four Steps: 1. Glycolysis 2. Pyruvate Oxidation 3. TCA Cycle 4. Electron Transport Chain Output: 6 CO 2 6 H 2 O 32-34 ATP Input:+ 6 O 2

17. 1. Glycolysis first step in cellular respiration occurs in the cytosol does NOT require O 2 input is: 1 glucose molecule 2 ATP molecules output is: 2 pyruvate molecules 4 ATP molecules 2 NADH molecules 2 H+ ions yield is: 2 pyruvate molecules 2 ATP molecules 2 NADH molecules 2 H+ ions

18. 2. Pyruvate Oxidation requires O2 input is: 2 pyruvate molecules output is: 2 acetyl CoA molecules 2 CO2 molecules 2 NADH molecules 2 H+ ions yield is: 2 acetyl CoA molecules 2 CO2 molecules 2 NADH molecules 2 H+ ions

19. 3. KREBS Cycle requires O 2 input is: 2 acetyl CoA molecules output is: 9 biochemical reactions yield is: 2 ATP molecules 4 CO2 molecules 6 NADH molecules 6 H+ ions 2 FADH2 molecules 2 GTP molecules

20. 4. Electron Transport Chain requires O2 input is: 10 NADH molecules 10 H + ions 2 FADH 2 molecules output is: 10 NAD + molecules 2 FAD + molecules 32-34 ATP molecules yield is: 32-34 ATP molecules

21. Other Glucose Modifications Glycogenesis Glycogenolysis Gluconeogenesis from lipids Gluconeogenesis from proteins Glycolysis

22. Absorptive (Fed) State

23. Postabsorptive (Fasting) State

24. Diabetes Mellitus Type I (IDDM): Juvenile Onset (childhood and puberty) Insulin-Producing cells are impaired Greatly reduced or absolute deficiency of insulin Polydipsia (excessive thirst) Polyphagia (excessive eating) Polyuria (excessive urination) Type II (NIDDM): Maturity Onset (usually >40) Risk increases with age and excessive weight (80% are obese) 90% of all Diabetes cases Can often be maintained with diet and exercise Insulin-Producing cells are functional Cells may make enough or too much insulin

25. Table 4-7, p. 122