PSL 250 MOD 1 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026

PSL 250 MOD 1 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE 2026 where is glycogen stored - Answers skeletal muscle and liver examples of buffers - Answers bicarbonate HCO3- (weak base) and carbonic acid H2CO3 (weak acid) general functions of protein - Answers 1. catalyzing chemical reactions 2. membrane transport 3. transport in blood 4. body movement 5. protection 6. structural support function of triglycerides - Answers long term energy storage in adipose tissue, cushioning, insulation function of phospholipids - Answers cell membrane - what comes in and out of cell, and builds integrity function of eicosanoids - Answers local hormones, immune response, blood clotting, pain function of steroids - Answers cholesterol = precursor for other steroids steroid hormones = promotes growth bile salts = digestive health classes of lipids - Answers PETS p = phospholipids e - eicosanoids t = triglycerides s = steroids 5 important molecules as chemical energy source + how long energy is sustained - Answers ATP: 2s PCr: 10s Glycogen: 1-2 hrs Lipids: many days Protein: several weeks 4 phases of cellular respiration - Answers 1. glycolysis 2. intermediate stage 3. citric acid cycle 4. ETC Glycolysis - Answers reactants: glucose, (ADP + Pi) products: Lactate/pyruvate, ATP occurs in cytosol intermediate stage - Answers reactants: pyruvate, CoA, NAD+ products: Acetyl CoA, NADH, CO2 occurs inside mitochondrial matrix Citric Acid Cycle - Answers reactants: Acetyl CoA, NAD+, FAD (ADP + Pi) products: NADH, FADH2, CO2 (ATP) occurs in mitochondrial matrix sizes and shapes of human cells - Answers neurons: 1m - irregular shaped Skeletal muscle cells: 1-600mm - cylindrical + striated RBC: ~ 7 um - biconcave disc Mitochondrion: 1um - 1 micron plasma membrane - Answers lipid bilayer