ABCP Basic Science UPDATED ACTUAL Questions and
CORRECT Answers
1. The right coronary artery is said to be dominant when: C
A. Greater than 80% of coronary venous return is via
the right coronary sinus.
B. Flow to the right ventricle occurs primarily in sys-
tole.
C. It gives rise to the posterior descending artery.
D. It arises from the right sinus of Valsalva.
2. The primary structural units of proteins are: C
A. Pyruvic acids.
B. Conjugated fatty acids.
C. L-amino acids.
D. Ribonucleic acids.
3. Which clotting factor is activated by contact with for- B
eign surfaces, roughened vascular walls, and platelet
aggregates?
A. V (Proaccelerin).
B. XII (Hageman).
C. VIII (Antihemophilic).
D. X (Stuart-Prower).
4. The effect of plasmin is to: A
A. Limit clotting by splitting fibrin.
B. Initiate the intrinsic pathway.
C. Cleave thrombin.
D. Activate the extrinsic pathway.
5. The normal arterio-venous oxygen difference is ap- C
proximately:
A. 7 mmHg.
B. 40 mmHg.
, C. 5 volumes percent.
D. 14 volumes percent.
6. Oxygen delivery will be decreased when a low venous C
oxygen tension and high venous oxyhemoglobin satu-
ration are present due to:
A. An increase in P50.
B. A decrease in P50.
C. Metabolic alkalosis.
D. Metabolic acidosis.
7. A characteristic of the oxygen-dissociation curve for D
fetal hemoglobin is that:
A. It is identical to the adult curve.
B. It shifts to the right of the maternal curve.
C. It is unrelated to the maternal curve.
D. It shifts to the left of the maternal curve.
8. At a given pO2, increasing the pCO2 results in: B
A. More oxygen bound to the hemoglobin.
B. Less oxygen bound to the hemoglobin.
C. No effect on the amount of oxygen bound to the
hemoglobin.
D. A decrease of P50.
9. A sample of blood cooled from 37ºC will undergo which A
of the following changes?
A. CO2 becomes more soluble and PaCO2 decreases.
B. CO2 becomes less soluble and pH decreases.
C. CO2 solubility does not change, bicarbonate levels
increase.
D. CO2 solubility increases and base excess levels de-
crease.
, 10. If the diffusion coefficient for oxygen is 1, the diffusion A
coefficient for carbon dioxide is:
A. 20.3.
B. 37.5.
C. 0.81.
D. 0.20.
11. In 85-95% of patients, the circumflex artery supplies A
the:
A. Lateral aspect of the left ventricle.
B. Entire posterior surface of the left ventricle.
C. Posterior ventricular septum.
D. Anterior medial papillary muscle.
12. The obtuse marginal artery is a branch of the: C
A. Left anterior descending artery.
B. Ramus intermedius.
C. Circumflex artery.
D. Right main coronary artery.
13. Diagonal coronary arteries supply the: A
A. Anterior wall of the LV.
B. Lateral wall of the LV.
C. Apex of the LV.
D. Free wall of the RV.
14. Which arterial wall layer is composed of lamellae of B
smooth muscle and elastic tissue?
A. Tunica adventitia.
B. Tunica media.
C. Tunica intima.
D. Tunica elastica externa.
CORRECT Answers
1. The right coronary artery is said to be dominant when: C
A. Greater than 80% of coronary venous return is via
the right coronary sinus.
B. Flow to the right ventricle occurs primarily in sys-
tole.
C. It gives rise to the posterior descending artery.
D. It arises from the right sinus of Valsalva.
2. The primary structural units of proteins are: C
A. Pyruvic acids.
B. Conjugated fatty acids.
C. L-amino acids.
D. Ribonucleic acids.
3. Which clotting factor is activated by contact with for- B
eign surfaces, roughened vascular walls, and platelet
aggregates?
A. V (Proaccelerin).
B. XII (Hageman).
C. VIII (Antihemophilic).
D. X (Stuart-Prower).
4. The effect of plasmin is to: A
A. Limit clotting by splitting fibrin.
B. Initiate the intrinsic pathway.
C. Cleave thrombin.
D. Activate the extrinsic pathway.
5. The normal arterio-venous oxygen difference is ap- C
proximately:
A. 7 mmHg.
B. 40 mmHg.
, C. 5 volumes percent.
D. 14 volumes percent.
6. Oxygen delivery will be decreased when a low venous C
oxygen tension and high venous oxyhemoglobin satu-
ration are present due to:
A. An increase in P50.
B. A decrease in P50.
C. Metabolic alkalosis.
D. Metabolic acidosis.
7. A characteristic of the oxygen-dissociation curve for D
fetal hemoglobin is that:
A. It is identical to the adult curve.
B. It shifts to the right of the maternal curve.
C. It is unrelated to the maternal curve.
D. It shifts to the left of the maternal curve.
8. At a given pO2, increasing the pCO2 results in: B
A. More oxygen bound to the hemoglobin.
B. Less oxygen bound to the hemoglobin.
C. No effect on the amount of oxygen bound to the
hemoglobin.
D. A decrease of P50.
9. A sample of blood cooled from 37ºC will undergo which A
of the following changes?
A. CO2 becomes more soluble and PaCO2 decreases.
B. CO2 becomes less soluble and pH decreases.
C. CO2 solubility does not change, bicarbonate levels
increase.
D. CO2 solubility increases and base excess levels de-
crease.
, 10. If the diffusion coefficient for oxygen is 1, the diffusion A
coefficient for carbon dioxide is:
A. 20.3.
B. 37.5.
C. 0.81.
D. 0.20.
11. In 85-95% of patients, the circumflex artery supplies A
the:
A. Lateral aspect of the left ventricle.
B. Entire posterior surface of the left ventricle.
C. Posterior ventricular septum.
D. Anterior medial papillary muscle.
12. The obtuse marginal artery is a branch of the: C
A. Left anterior descending artery.
B. Ramus intermedius.
C. Circumflex artery.
D. Right main coronary artery.
13. Diagonal coronary arteries supply the: A
A. Anterior wall of the LV.
B. Lateral wall of the LV.
C. Apex of the LV.
D. Free wall of the RV.
14. Which arterial wall layer is composed of lamellae of B
smooth muscle and elastic tissue?
A. Tunica adventitia.
B. Tunica media.
C. Tunica intima.
D. Tunica elastica externa.
