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






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






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






4. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






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






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






7. 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






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






9. 2 portal systems to know






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






11. Amount of blood pumped w/ each systolic contraction






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

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






14. AV valve between right atrium and right ventricle






15. Excessive bleeding that results from defective proteins






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






17. Hematocrit or RBC those compose 35-45% of the blood; cells are non - nucleated and have no organelles. Acquire ATP through glycolysis have biconcave shape to maximize surface area for binding O2






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






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






20. Destroy parasites and are involved in allergic rxns






21. Number of systole contractions per unit time






22. As low as pressure gets btw heart beats in arteries






23. 2 ways to increase venous return






24. Osmotic pressure in capillaries due to plasma proteins






25. Reservoirs where blood collects from veins






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






27. Breakdown product of the hemogloblin heme group






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






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






30. 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






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






32. Highest blood pressure that occurs during ventricular contraction






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






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






35. 2 lymphocytes






36. Universal donor






37. ABO blood group and Rh blood group






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






39. 2 chambers of the heart






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






41. Where are RBCs broken down?






42. The difference btw systolic and diastolic blood pressures






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






44. Blood clot or scab circulating in bloodstream






45. 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






46. Glucose - amino acids - and fats






47. Valves between the large arteries and the ventricles






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






49. When do Rh antibodies develop?






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






Can you answer 50 questions in 15 minutes?



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