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






2. Occurs when increased cardiac output is needed; the postganglionic nerve directly innervates the heart - releasing norepinephrine - increasing heart rate and force of contraction






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






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






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






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






7. Opposing friction force to flow - which increases with decreased radius; determined by degree of contraction of arterial smooth muscle






8. 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






9. Protein that maintains oncotic pressure in capillaries






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






11. Heart rate *stroke volume= (units)






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






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






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






15. ABO blood group and Rh blood group






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






17. 2 portal systems to know






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






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






20. Which is longer - diastole or systole?






21. Produced during cell metabolism and diffuses through the endothelial cells into the blood stream - where it is picked up by the liver and converted to forms that can be excreted (all other wastes are picked up by the kidneys)






22. Buffer in blood. Keeps pH around 7.4






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






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






25. 2 lymphocytes






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






27. 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






28. What is the direct cause of edema?






29. What is the only process RBC use to generate ATP?






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






31. Glycoproteins that are coded for by 3 alleles (A - B - i)






32. Crosses septum and connects to Purkinje fibers to allow coordinated contraction of ventricles. Key is that is slows transmission across septum to allow ventricles to fully fill before contraction






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






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






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






36. Fat storage cells of the body






37. Breakdown product of the hemogloblin heme group






38. Excessive bleeding that results from defective proteins






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






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






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






42. Body's mechanism of preventing bleeding






43. Valves between the large arteries and the ventricles






44. The difference btw systolic and diastolic blood pressures






45. Number of systole contractions per unit time






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






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






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






49. Where are RBCs broken down?






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests