SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
MCAT Biology Circulatory System
Start Test
Study First
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. Receptors in the carotid arteries and aortic arch that notify CNS if blood pressure is high or low
WBC
Baroreceptors
albumin b/c it provides the bulk of oncotic pressure in blood vessels - preventing edema
fibrin
2. Have single layer endothelial cells w/ spaces in between cells called intercellular cleft
resistance
O- since there are no surface antigens for antibodies to bind to...
Capillaries
Hemoglobin
3. Voltage - gated channels that stay open longer than Na channels and open later responsible for the plateau phase of cardiac muscle contraction
Slow Ca channels
stroke volume
tricuspid valve
Hemoglobin
4. When do semilunar valves close?
Arterial pressure=ventricular pressure
Repolarization of nodes
Sickle cell anemia
basophil
5. Precursor to fibrin - which is necessary for blood clotting
fibrinogen
veins
Coronary arteries
Hepatic portal vein
6. Request by tissues to increase blood flow - where build up of metabolic waste causes arterioles to dialate
glycolysis. RBC have no ETC - FA oxidation - or TCA cycle
tricuspid valve
Primary transportation fo CO2 in the blood
local autoregulation
7. Where do all components of the blood develop from?
bone marrow
Na leak channels
Temperature or metabolic rate
B cells and T cells
8. 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)
adipocytes
Waste
Lipoproteins
Hemoglobin
9. Transportation of blood though the body and exchange of material btw blood and tissues
Fxn of circulatory system
basophil
Slow Ca channels
resistance
10. Mother has Rh - blood with Rh+ antibodies that attack the babies Rh+ blood
AB+ since no antibodies are made to any blood type
Sickle cell anemia
Immunoglobulins (antibodies)
Hemolytic disease of a newborn
11. What causes tendency of water flow out of blood?
capillaries
high osmolarity of tissues
venous return
serum
12. Store and release histamine and are involved in allergic rxns
basophil
adrenergic tone
WBC
Pulmonary and aortic semilunar valves
13. Force per unit area exerted by blood on walls of arteries
Arterial pressure=ventricular pressure
diastolic blood pressure
Ca channels
systemic arterial blood pressure
14. Muscular pump that forces blood through series of branching vessels
bone marrow
stroke volume
Inflammation
heart
15. Voltage - gated channels that open quickly; open at threshold potential
Fast Na channels
Baroreceptors
when person that is Rh - is exposed to blood that is Rh+
ventricles
16. Pump blood out of the heart at high pressures into arteries
bicuspid (mitral) valve
fibrinogen
ventricles
Peripheral resistance
17. Valves between the large arteries and the ventricles
Pulmonary and aortic semilunar valves
heart rate
Internodal tract
basophil
18. Open when threshold is reached causing membrane potential to increase/depolarize; operate slower than Na channels
Right atrium
Ca channels
coronary sinus
hemophilia
19. Contraction of the ventricles - where pressure increases rapidly - causing AV valves to close - Marks the beginning of the 'lub' sound
Systole
varicose veins
Ohm's law
Internodal tract
20. 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
Third transportation of CO2 in the blood
Erythropoetin
glycolysis. RBC have no ETC - FA oxidation - or TCA cycle
bicuspid (mitral) valve
21. Heart rate *stroke volume= (units)
Internodal tract
megakaryocytes
atria
cardiac output (L/min)
22. Confirmation of hemoglobin with O2 bound - where affinity is high 1. pH 2. pCO2 3.
Relaxed
hepatic portal system and hypothalamic - hypophosial portal system
hemostasis
Systole
23. Path where impulse travels from SA to AV node
Erythropoetin
Third transportation of CO2 in the blood
arteries
Internodal tract
24. Is cardiac output the same or different btw the two ventricles?
venous blood pressure
adipocytes
Arterial pressure=ventricular pressure
It is the same - otherwise it would lead to fluid backup
25. Monocyte that phagocytoses debris and microorganisms - has amoeboid motility - and displays chemotaxis
Diastole
Ischemia
macrophage
bone marrow
26. 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
Hemoglobin
pulse pressure
megakaryocytes
Third transportation of CO2 in the blood
27. Amount of blood pumped w/ each systolic contraction
Ischemia
AB+ since no antibodies are made to any blood type
Capillaries
stroke volume
28. Excessive bleeding that results from defective proteins
nutrients
Primary transportation fo CO2 in the blood
hemophilia
Blood plasma
29. Fat storage cells of the body
adipocytes
Glucose
fibrin
Cardiac muscle cells
30. Region that initiates start of cardiac cycle - which acts as a pacemaker of the heart; has unstable resting potential due to Na leak channels
ABO blood group
atria
venous return
SA node
31. Vessels that carry blood away from the heart at high pressure
B cells and T cells
Platelet fxn
Rh blood group
arteries
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
veins
albumin b/c it provides the bulk of oncotic pressure in blood vessels - preventing edema
Bundle of His
amino acids and glucose
33. Valves between the ventricle and the atria to prevent back flow
atrioventricular valves
urea
venous return
Primary transportation fo CO2 in the blood
34. Reservoirs where blood collects from veins
Right atrium
cardiac output (L/min)
nutrients
atria
35. 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
Erythrocytes
2 components of antigens
Ohm's law
hepatic portal system and hypothalamic - hypophosial portal system
36. Why is the SA node the primary pacemaker?
Hemolytic disease of a newborn
It has the most Na leak channels - allowing to reach threshold potential first; all other nodes leak - but rate at as quick of a rate
WBC
Spleen and liver
37. Universal acceptor
venous blood pressure
AB+ since no antibodies are made to any blood type
valves
arteries
38. When do Rh antibodies develop?
O- since there are no surface antigens for antibodies to bind to...
fats
Capillaries
when person that is Rh - is exposed to blood that is Rh+
39. Body's mechanism of preventing bleeding
high osmolarity of tissues
High since the concentration of plasma proteins has increased due to movement of water
hemostasis
Coronary arteries
40. Confirmation of hemoglobin with no O2 bound - so it has low affinity
Tense
Diastole is longer
Intercalated discs
Sickle cell anemia
41. The difference btw systolic and diastolic blood pressures
Ohm's law
Internodal tract
High since the concentration of plasma proteins has increased due to movement of water
pulse pressure
42. Glucose - amino acids - and fats
Hemoglobin
nutrients
bilirubin
AV node
43. Because the veins have essentially 0 pressure - these valves ensure one - way flow - skeletal muscle contraction encourages flow through veins
Valves of the venous system
2 components of antigens
Hepatic portal vein
Fast Na channels
44. AV valve between right atrium and right ventricle
venous blood pressure
primary bicarbonate generated from CO2.
tricuspid valve
megakaryocytes
45. At the end of the capillary - is the osmotic pressure high or low?
High since the concentration of plasma proteins has increased due to movement of water
increase vagal signal and inhibits sympathetic input
Temperature or metabolic rate
Coronary veins
46. Bone marrow cells that give rise to RBC and platelets
megakaryocytes
Granulocytes
local autoregulation
valves
47. Universal donor
Granulocytes
WBC
O- since there are no surface antigens for antibodies to bind to...
bone marrow
48. Tissue which the cytoplasm of different cells communicate via gap junctions
Hemoglobin
Functional syncytium
fibrin
T- tubules
49. Key proteins for the function of the immune system that are produced and released by B- cells
Fxn of circulatory system
hepatic portal system and hypothalamic - hypophosial portal system
Immunoglobulins (antibodies)
Glucose
50. First branches from the aorta that provide the heart's blood supply
Coronary arteries
Erythrocytes
macrophage
AV node