Bio255 Exam 1 2024 Latest Version Questions And Detailed Answers

*RBC cycle* exam q {Ans: 1. kidney releases EPO in response to Hypoxia; EPO stimulates bone marrow 2. bone marrow starts to produce stem cells 3. stem cell matures over ~1 week 4. reticulocyte becomes anucleated which finalizes RBC process -->lives ~120 days -->RBCs created in *bone marrow*}Endstolic volume means? {Ans: volume of blood inside ventricle at the end of atrial systolic/contraction}What is a more absorbant form of iron {Ans: Fe2+}function and percent of Lymphocytes {Ans: 25-33% immunity Destroy cancer cells, cells infected with viruses, Secrete antibodies}Which cells are phagocytic? {Ans: neutrophils, monocytes, eosinophils}function and percent of Neutrophils {Ans: 60-70% Phagocytize bacteria Release antimicrobial chemicals}What are the vitamines needed for healthy blood cell production? {Ans: Iron folic acid amino proteins Vit B12}function of erythropoietin {Ans: A hormone produced in the kidney to stimulate the production of red blood cells when hypoxia (Low O2) is detected.}The "Lubb" sound =________ the "Dubb" sound=________ {Ans: Lubb= AV Valves closing Dubb= Semilunar valves closing **this happens together and the only time the heart makes a sound is when valves are closing**}intercalated discs contain {Ans: gap junctions and desmosomes}What are transferrin and ferritin? {Ans: