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. Fat storage cells of the body






2. Osmotic pressure in capillaries due to plasma proteins






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


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






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






6. 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






7. Flow of blood through a tissue






8. What is the direct cause of edema?






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






10. Valves between the large arteries and the ventricles






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






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






13. When do Rh antibodies develop?






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






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






16. 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






17. 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)






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






19. AV valve between left atrium and left ventricle






20. Body's mechanism of preventing bleeding






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






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






23. 2 portal systems to know






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






25. Reservoirs where blood collects from veins






26. 3 substances that can diffuse through intercellular cleft






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






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






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






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






31. Blood clot or scab circulating in bloodstream






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






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






34. Breakdown product of the hemogloblin heme group






35. Path where impulse travels from SA to AV node






36. 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






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






38. Buffer in blood. Keeps pH around 7.4






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






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






41. 1. depolarization caused by fast Na channels - where action potential through intercalated discs reaches threshold potential - opening Na channels 2. initial depolarization with Na channels closing and k channels opening - but Ca channels also open 3






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






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






44. 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






45. Which is longer - diastole or systole?






46. 2 chambers of the heart






47. 2 lymphocytes






48. Heart rate *stroke volume= (units)






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






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