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. Pool of deoxygenated blood at low pressure - which collects blood from coronary veins - Only deoxygenated blood to not enter the right atrium via the vena cava






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






3. Blood clot or scab circulating in bloodstream






4. Valves between the large arteries and the ventricles






5. AV valve between left atrium and left ventricle






6. Aggregate at site of damage to a blood vessel and form a platelet plug to stop bleeding






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






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






9. 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






10. 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


11. Site of exchange btw blood and tissues; smallest vessels that allow one RBC through at a time






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






13. Is cardiac output the same or different btw the two ventricles?






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






15. Neural sympathetic input by postganglionic neuron of norepinephrine innervating arterial smooth muscle






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






17. Metabolic waste product in breakdown of amino acids






18. Universal donor






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






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






21. Have single layer endothelial cells w/ spaces in between cells called intercellular cleft






22. Return of blood to the heart by the vena cava - where increased venous return causes increased stretching of the muscle (increases stroke volume)






23. Where do all components of the blood develop from?






24. Active form of fibrinogen - protein forms a mesh that holds platelet plug together to protect wound - ibrinogen is converted to (blank) by thrombin






25. Purpose of erythrocytes?






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






27. Allow Na to leak across membrane - causing cell potential to get closer to threshold potential; allow threshold to be reached for Ca channels to open let Ca into the cell






28. Response by CNS when blood pressure is too low






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






30. AV valve between right atrium and right ventricle






31. The difference btw systolic and diastolic blood pressures






32. 2 portal systems to know






33. Essentially 0 mmHg - which results b/c of branching of vessels dissipating pressure to overcome resistance






34. Neutrophil - eosinophil - and basophil






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






36. 2 ways to increase venous return






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






38. Glucose - amino acids - and fats






39. Highest blood pressure that occurs during ventricular contraction






40. Force per unit area exerted by blood on walls of arteries






41. Precursor to fibrin - which is necessary for blood clotting






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






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






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






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






46. Protein in RBC that transport O2 though the blood since O2 is too hydrophobic in plasma; protein has 4 subunits that change confirmation cooperatively depending on the concentration of O2






47. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






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






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






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