Test your basic knowledge |

MCAT Biology Circulatory System

Subjects : mcat, health-sciences
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Fat storage cells of the body






2. Inadequate blood flow - resulting in tissue damage due to shortage of O2 and nutrients - and increase of metabolic waste






3. Region that initiates start of cardiac cycle - which acts as a pacemaker of the heart; has unstable resting potential due to Na leak channels






4. Rh factor that follows dominant pattern (Rh+ in heterozygote)






5. ABO blood group and Rh blood group






6. Plasma that lacks clotting proteins






7. Flow from the heart to the rest of the body; pumped by the left side of the heart






8. Control of by ANS of rate of contraction through the Vagus nerve. Postganglionic release in SA node of ACH inhibits depolarization






9. The difference in pressure divided blood flow; controlled by the sympathetic nervous system generating adrenergic tone






10. First branches from the aorta that provide the heart's blood supply






11. Response by CNS when blood pressure is too high






12. Store and release histamine and are involved in allergic rxns






13. Open when threshold is reached causing membrane potential to increase/depolarize; operate slower than Na channels






14. Tissue which the cytoplasm of different cells communicate via gap junctions






15. Buffer in blood. Keeps pH around 7.4






16. The difference btw systolic and diastolic blood pressures






17. What is the direct cause of edema?






18. Contraction of the ventricles - where pressure increases rapidly - causing AV valves to close - Marks the beginning of the 'lub' sound






19. Universal acceptor






20. Confirmation of hemoglobin with no O2 bound - so it has low affinity






21. Voltage - gated channels that open quickly; open at threshold potential






22. When do semilunar valves close?






23. Pass through the capillaries in order to patrol the tissue for invading organisms; only macrophages and neutrophils can squeeze through cleft






24. When do Rh antibodies develop?






25. Adequate circulation - but O2 supply is reduced (no build up waste products or loss of nutrients)






26. Valves between the large arteries and the ventricles






27. Maximize entry of Ca into the cell by allowing entry of Ca extracellular environment; leads to contraction of actin - myosin fibers






28. 2 chambers of the heart






29. Bone marrow cells that give rise to RBC and platelets






30. Phagocytose bacteria resulting in pus; amoeboid motility and chemotaxis






31. Caused by closure of Ca channels and opening of K channels






32. Muscular pump that forces blood through series of branching vessels






33. Body's mechanism of preventing bleeding






34. Difference in pressure=blood flow (L/min)*resitance ^P=Q*R

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


35. Valves between the ventricle and the atria to prevent back flow






36. Flow of blood through a tissue






37. At position 6 - missense mutation substitutes valine for glutamate. valine is hydrophobic - where glutamate was charged. It is an autosomal recessive disease where RBCs accumulated in small vessels - heterozygote for (blank) shows resistance to malar






38. Vessels that carry blood away from the heart at high pressure






39. Request by tissues to increase blood flow - where build up of metabolic waste causes arterioles to dialate






40. Peptide hormone secreted from the kidneys to increase RBC production in bone marrow






41. Voltage - gated channels that stay open longer than Na channels and open later responsible for the plateau phase of cardiac muscle contraction






42. The principle sugar in blood that maintains a relatively constant concentration for adequate nutrition






43. Protein that maintains oncotic pressure in capillaries






44. Pump blood out of the heart at high pressures into arteries






45. Connected to SA node via internodal tract - and passes signal to Common bundle of His to contract ventricles






46. 3 factors that dictate the affinity of hemoglobin for O2






47. CO2 is soluble in H2O - and thus some is dissolved and carried to lungs and tissues in plasma - O2 is not soluble in plasma at all






48. Absorbed by the GI tract and brought to the liver via the hepatic portal vein - where they are stored in the liver and enter the blood stream when needed






49. Reservoirs where blood collects from veins






50. Where blood passes through 2 sets of capillaries before returning to the heart; Evolved as direct transport routes