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






2. Highest blood pressure that occurs during ventricular contraction






3. Glucose - amino acids - and fats






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






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






6. Protein that maintains oncotic pressure in capillaries






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






8. Plasma that lacks clotting proteins






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






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






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






12. AV valve between left atrium and left ventricle






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






14. 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






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






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






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






18. 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






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






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






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






22. Metabolic waste product in breakdown of amino acids






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






24. Body's mechanism of preventing bleeding






25. Where are RBCs broken down?






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






27. 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






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






29. The difference btw systolic and diastolic blood pressures






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






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






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






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






34. Key proteins for the function of the immune system that are produced and released by B- cells






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






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






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






38. Universal donor






39. 2 portal systems to know






40. Buffer in blood. Keeps pH around 7.4






41. 73% of CO2 converted to carbonic acid by carbonic anhydrase - and carbonic acid is converted to bicarbonate - which acts a buffer






42. Number of systole contractions per unit time






43. Receptors in the carotid arteries and aortic arch that notify CNS if blood pressure is high or low






44. Response by CNS when blood pressure is too low






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






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






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






49. Which is longer - diastole or systole?






50. Valves between the large arteries and the ventricles







Sorry!:) No result found.

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