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Test your basic knowledge |
MCAT Biology Circulatory System
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Subjects
:
mcat
,
health-sciences
Instructions:
Answer 50 questions in 15 minutes.
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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. 2 chambers of the heart
Inflammation
atria and ventricles
eosinophil
Ischemia
2. Voltage - gated channels that stay open longer than Na channels and open later responsible for the plateau phase of cardiac muscle contraction
Fxn of circulatory system
high osmolarity of tissues
Slow Ca channels
Peripheral resistance
3. Vessels that carry blood away from the heart at high pressure
Portal systems
arteries
systemic arterial blood pressure
Temperature or metabolic rate
4. The principle sugar in blood that maintains a relatively constant concentration for adequate nutrition
hypoxia
Glucose
Internodal tract
ABO blood group
5. Plasma that lacks clotting proteins
serum
Immunoglobulins (antibodies)
Capillaries
Baroreceptors
6. Store and release histamine and are involved in allergic rxns
Diastole
2 components of antigens
High since the concentration of plasma proteins has increased due to movement of water
basophil
7. Region that initiates start of cardiac cycle - which acts as a pacemaker of the heart; has unstable resting potential due to Na leak channels
Baroreceptors
SA node
venous return
Sickle cell anemia
8. Vessels that carry blood back to the heart at low pressure
1. increase total blood volume by retaining more H2O 2. Contraction of large veins - propelling blood toward the heart
Temperature or metabolic rate
veins
fibrin
9. Control of by ANS of rate of contraction through the Vagus nerve. Postganglionic release in SA node of ACH inhibits depolarization
Third transportation of CO2 in the blood
5 phases of cardiac muscle cell contraction
Vagal Signal
fibrinogen
10. 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
cardiac output (L/min)
Bundle of His
1. increase total blood volume by retaining more H2O 2. Contraction of large veins - propelling blood toward the heart
11. Caused by closure of Ca channels and opening of K channels
Repolarization of nodes
O- since there are no surface antigens for antibodies to bind to...
nutrients - wastes - and WBC
Fast Na channels
12. AV valve between left atrium and left ventricle
Sympathetic regulation of heart
Bundle of His
Primary transportation fo CO2 in the blood
bicuspid (mitral) valve
13. Precursor to fibrin - which is necessary for blood clotting
bicuspid (mitral) valve
to transport O2 to tissues and CO2 to the lungs
albumin
fibrinogen
14. Voltage - gated channels that open quickly; open at threshold potential
Fast Na channels
Rh blood group
fibrinogen
pulmonary circulation
15. 2 lymphocytes
increased hydrostatic pressure in the capillaries - which increases the fluid that leaks out of the capillaries into the interstitum
atria and ventricles
B cells and T cells
hemostasis
16. 3 substances that can diffuse through intercellular cleft
Na leak channels
Frank - Starling Effect
pulmonary circulation
nutrients - wastes - and WBC
17. Force per unit area exerted by blood on walls of arteries
glycolysis. RBC have no ETC - FA oxidation - or TCA cycle
oncotic pressure
Lipoproteins
systemic arterial blood pressure
18. Where do all components of the blood develop from?
CNS decreases vagal signal and sympathetic input increases
pulse pressure
Intercalated discs
bone marrow
19. Transportation of blood though the body and exchange of material btw blood and tissues
amino acids and glucose
Coronary veins
Waste
Fxn of circulatory system
20. 55% of whole blood that is composed of electrolytes - lipoproteins - sugars - buffer - and metabolic waste
fibrinogen
amino acids and glucose
Blood plasma
heart
21. Large particles consisting of fats - cholesterol - and carrier proteins; transport lipids through the blood stream
nutrients
Bundle of His
Valves of the venous system
Lipoproteins
22. 2 ways to increase venous return
neutrophil
1. increase total blood volume by retaining more H2O 2. Contraction of large veins - propelling blood toward the heart
Coronary arteries
hepatic portal system and hypothalamic - hypophosial portal system
23. Connected to SA node via internodal tract - and passes signal to Common bundle of His to contract ventricles
increased hydrostatic pressure in the capillaries - which increases the fluid that leaks out of the capillaries into the interstitum
Functional syncytium
Blood plasma
AV node
24. Return of blood to the heart by the vena cava - where increased venous return causes increased stretching of the muscle (increases stroke volume)
Primary transportation fo CO2 in the blood
venous return
Peripheral resistance
Vagal Signal
25. Lipoproteins that enter lacteal vessels of lymphatic system in the intestinal wall
basophil
Secondary transportation of CO2 in the blood
systemic circulation
chylomicrons
26. As low as pressure gets btw heart beats in arteries
Spleen and liver
diastolic blood pressure
1. increase total blood volume by retaining more H2O 2. Contraction of large veins - propelling blood toward the heart
High since the concentration of plasma proteins has increased due to movement of water
27. Gap junctions in the cardiac muscle - where depolarization is communicated directly btw cytoplasm of neighboring cardiac cells
Coronary arteries
Blood plasma
Intercalated discs
to transport O2 to tissues and CO2 to the lungs
28. Which is longer - diastole or systole?
Diastole is longer
Platelet fxn
CNS decreases vagal signal and sympathetic input increases
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
29. 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
oncotic pressure
Functional syncytium
Capillaries
amino acids and glucose
30. Fat storage cells of the body
ventricles
Spleen and liver
adipocytes
neutrophil
31. Flow of blood through a tissue
Perfusion
Inflammation
eosinophil
Sickle cell anemia
32. Aggregate at site of damage to a blood vessel and form a platelet plug to stop bleeding
Erythropoetin
bilirubin
Platelet fxn
O- since there are no surface antigens for antibodies to bind to...
33. Pass through the capillaries in order to patrol the tissue for invading organisms; only macrophages and neutrophils can squeeze through cleft
WBC
basophil
arteries
Diastole
34. Mother has Rh - blood with Rh+ antibodies that attack the babies Rh+ blood
macrophage
nutrients
Hemolytic disease of a newborn
WBC
35. Opposing friction force to flow - which increases with decreased radius; determined by degree of contraction of arterial smooth muscle
resistance
heart
valves
High since the concentration of plasma proteins has increased due to movement of water
36. Protein that maintains oncotic pressure in capillaries
albumin b/c it provides the bulk of oncotic pressure in blood vessels - preventing edema
albumin
bilirubin
oncotic pressure
37. Neural sympathetic input by postganglionic neuron of norepinephrine innervating arterial smooth muscle
Sympathetic regulation of heart
fats
It is the same - otherwise it would lead to fluid backup
adrenergic tone
38. Site of exchange btw blood and tissues; smallest vessels that allow one RBC through at a time
AB+ since no antibodies are made to any blood type
heart
Inflammation
capillaries
39. Flow of blood from the heart to the lungs - pumped by the right side of the heart
pulmonary circulation
systemic circulation
high osmolarity of tissues
bilirubin
40. Buffer in blood. Keeps pH around 7.4
Sympathetic regulation of heart
primary bicarbonate generated from CO2.
adrenergic tone
Peripheral resistance
41. Phagocytose bacteria resulting in pus; amoeboid motility and chemotaxis
neutrophil
Hemoglobin
systemic arterial blood pressure
Glucose
42. 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
SA node
heart rate
AV node
43. Osmotic pressure in capillaries due to plasma proteins
resistance
Immunoglobulins (antibodies)
oncotic pressure
coronary sinus
44. Pump blood out of the heart at high pressures into arteries
Portal systems
ventricles
Rh blood group
Right atrium
45. Neutrophil - eosinophil - and basophil
It is the same - otherwise it would lead to fluid backup
Granulocytes
fibrinogen
Erythrocytes
46. Valves between the ventricle and the atria to prevent back flow
Thrombus
megakaryocytes
atrioventricular valves
pulse pressure
47. Universal acceptor
fats
AB+ since no antibodies are made to any blood type
high osmolarity of tissues
Waste
48. Amount of blood pumped w/ each systolic contraction
Tense
5 phases of cardiac muscle cell contraction
stroke volume
Sympathetic regulation of heart
49. Tissue which the cytoplasm of different cells communicate via gap junctions
Functional syncytium
hemostasis
AB+ since no antibodies are made to any blood type
Arterial pressure=ventricular pressure
50. Confirmation of hemoglobin with no O2 bound - so it has low affinity
Tense
hepatic portal system and hypothalamic - hypophosial portal system
AV node
Sickle cell anemia
Sorry!:) No result found.
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