ABCP Board review 2023//2024

ABCP Board review 2023//2024 The major cation found in extracellular fluid is? a) K+ b) Ca++ c) Mg++ d) Na+ - ANSWER d) Na+ Oxygen delivery will be decreased when a low venous oxygen tension and high venous oxyhemoglobin saturation are present due to: a) increase in P50 b) decrease in P50 c) metabolic alkalosis d) metabolic acidosis - ANSWER c) metabolic alkalosis At a given PO2, increasing PCO2 results in: a) more O2 bound to the hemoglobin b) less O2 bound to hemoglobin c) no effect on amt of O2 bound to hemoglobin d) decrease in P50 - ANSWER b) less O2 bound to the hemoglobin A sample of blood cooled from 37'C will undergo which change? a) CO2 becomes more soluble and PaCO2 decreases b) CO2 becomes less soluble and pH decreases c) CO solubility does not change, bicarbonate increases d) CO2 solubility increases and base excess decreases - ANSWER a) CO2 becomes more soluble and PaCO2 decreases In 85-95% of patients, the circumflex artery supplies the: a) lateral aspect of left ventricle b) entire posterior surface of left ventricle c) posterior ventricular septum d) anterior medial papillary muscle - ANSWER a) the lateral aspect of left ventricle A characteristic of leukocytes is that they are : a) smaller than erythrocytes b) larger than platelets c) uniform in shape d) 700-1200/ml of blood - ANSWER b) larger than platelets The main function of an enzyme is to: a) increase the rate of a biochemical reaction b) initiate a biochemical reaction c) act as a substrate for a biochemical reaction d) alter the equilibrium of biochemical reaction - ANSWER a) increase the rate of biochemical reaction Which of the following is not a normal route for blood return directly to the interior of the heart? a) coronary sinus b) Thebesian veins c) pulmonary veins d) bronchial veins - ANSWER d) bronchial veins The effect of calcium channel-blocking drugs is: a) marked decrease in transmembrane calcium current b) increase in smooth muscle response c) to allow for consistent depolarization of card