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. Phagocytose bacteria resulting in pus; amoeboid motility and chemotaxis






2. 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


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






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






5. Lipoproteins that enter lacteal vessels of lymphatic system in the intestinal wall






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






7. Monocyte that phagocytoses debris and microorganisms - has amoeboid motility - and displays chemotaxis






8. Large particles consisting of fats - cholesterol - and carrier proteins; transport lipids through the blood stream






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






10. 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






11. Because the veins have essentially 0 pressure - these valves ensure one - way flow - skeletal muscle contraction encourages flow through veins






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






13. Ensure the one - way flow through the circulatory system






14. 1. depolarization caused by fast Na channels - where action potential through intercalated discs reaches threshold potential - opening Na channels 2. initial depolarization with Na channels closing and k channels opening - but Ca channels also open 3






15. When do Rh antibodies develop?






16. Reservoirs where blood collects from veins






17. 3 substances that can diffuse through intercellular cleft






18. Universal donor






19. Confirmation of hemoglobin with O2 bound - where affinity is high 1. pH 2. pCO2 3.






20. Connects the two capillary beds of the intestine and the liver






21. Mother has Rh - blood with Rh+ antibodies that attack the babies Rh+ blood






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






23. Vessels where deoxygenated blood from coronary sinus continue to flow into heart






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






25. 2 portal systems to know






26. AV valve between left atrium and left ventricle






27. At the end of the capillary - is the osmotic pressure high or low?






28. Flow of blood from the heart to the lungs - pumped by the right side of the heart






29. Which is longer - diastole or systole?






30. 20% transported stuck to hemoglobin; why increased pCO2 decreases affinity of O2






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






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






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






34. Receives deoxygenated blood from systemic circulation (superior and inferior vena cava)






35. Stretching to greater degree of heart muscle causes more forceful contraction; stretching increase occur by increasing fluid volume






36. Absorbed in the intestine and packaged in chylomicrons - which enter the lymphatic system - and dumped into the subclavian vein via the thoracic duct; the liver takes fats once in blood - converts them to another lipoprotein and sends them to adipocy






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






38. Gap junctions in the cardiac muscle - where depolarization is communicated directly btw cytoplasm of neighboring cardiac cells






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






40. What is the direct cause of edema?






41. When the valve of a vein fails and back flow occurs; blood not being moved toward the heart






42. Transportation of blood though the body and exchange of material btw blood and tissues






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






44. Filling of the ventricles by squeezing of the atria - marks the beginning of the 'dub' sound






45. What is the most important plasma protein in the body? Why?






46. Vessels that carry blood back to the heart at low pressure






47. Fat storage cells of the body






48. Capillaries dilate - increasing the cleft size - which allows more H2O to move through to tissues






49. Resting membrane potential of -90mV and have long duration action potentials






50. 2 chambers of the heart