Questions and CORRECT Answers
The major cation found in extracellular fluid is? a) K+ b) Ca++ c) Mg++ d) Na+ - CORRECT
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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 cardiac cells
d) increase in cardiac muscle response - CORRECT ANSWER a) marked decrease in
transmembrane calcium current
, Calan (verapamil) is indicated for which of the following:
a) HTN refractory to high doses of beta-adrenergic block agents
b) presence of sick sinus syndrome and/ or heart block
c) a-fib with rapid ventricular response
d) cardiogenic shock induced by coronary artery spasm - CORRECT ANSWER c) atrial
fibrillation with rapid ventricular response
The cardiovascular effect of Inocor (amrinone) include:
a) increased systemic vascular resistance
b) decreased pulmonary artery pressure
c) increased LVEDP
d) decreased myocardial oxygen consumption - CORRECT ANSWER b) decreased
pulmonary vascular resistance
Which of the following anesthetic agents has the shortest duration of action?
a) Sublimaze (fentanyl)
b) Ativan (lorazepam)
c) Diprivan (propofol)
d) Sufenta (sufentanyl) - CORRECT ANSWER c) Dipravan (propofol)
Which of the following effects does NOT occur w/ morphine sulfate?
a) increased peripheral vascular resistance
b) decreased myocardial O2 consumption
c) analgesia
d) urinary retention - CORRECT ANSWER a) increased peripheral vascular resistance
Which of the following drugs increase the tolerance of the brain to global ischemia when
administered prior to ischemic episode?