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. Response by CNS when blood pressure is too low






2. Which is longer - diastole or systole?






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






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






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






6. Where are RBCs broken down?






7. 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


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






9. 2 portal systems to know






10. 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






11. 3 substances that can diffuse through intercellular cleft






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






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






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






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






16. 3 factors that dictate the affinity of hemoglobin for O2






17. 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






18. Blood clot or scab circulating in bloodstream






19. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste






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






21. Fat storage cells of the body






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






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






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






25. Number of systole contractions per unit time






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






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






28. Adequate circulation - but O2 supply is reduced (no build up waste products or loss of nutrients)






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






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






31. Body's mechanism of preventing bleeding






32. Valves between the large arteries and the ventricles






33. Path where impulse travels from SA to AV node






34. Universal acceptor






35. 2 ways to increase venous return






36. 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






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






38. Highest blood pressure that occurs during ventricular contraction






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






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






41. 2 lymphocytes






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






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






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






45. Destroy parasites and are involved in allergic rxns






46. Excessive bleeding that results from defective proteins






47. Store and release histamine and are involved in allergic rxns






48. AV valve between right atrium and right ventricle






49. Request by tissues to increase blood flow - where build up of metabolic waste causes arterioles to dialate






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