Nokea
What are the names of the chambers of the heart?
- A. atriums and veins
- B. ventricles and arteries
- C. atriums and ventricles
- D. arteries and veins
Correct Answer: C
Rationale: The heart has four chambers: two atria (plural of atrium) and two ventricles, making 'atriums and ventricles' the correct answer.
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The ductus arteriosus allows fetal blood to bypass the nonfunctioning fetal liver.
- A. TRUE
- B. FALSE
Correct Answer: B
Rationale: The ductus arteriosus connects the pulmonary artery to the aorta, bypassing the nonfunctional fetal lungs.
A patient who is receiving dobutamine for the treatment of acute decompensated heart failure (ADHF) has the following nursing interventions included in the plan of care. Which action will be most appropriate for the registered nurse (RN) to delegate to an experienced licensed practical/vocational nurse (LPN/LVN)?
- A. Teach the patient the reasons for remaining on bed rest
- B. Change the peripheral IV site according to agency policy
- C. Monitor the patient's blood pressure and heart rate every hour
- D. Titrate the rate to keep the systolic blood pressure >90 mm Hg
Correct Answer: C
Rationale: An experienced LPN/LVN would be able to monitor BP and heart rate and would know to report significant changes to the RN. Teaching patients, making adjustments to the drip rate for vasoactive drugs, and inserting a new peripheral IV catheter require RN level education and scope of practice.
The biology of tumor growth most commonly follows which of the following mechanisms?
- A. Logarithmic progression
- B. Logarithmic regression
- C. Gompertzian kinetics
- D. Michaelis-Mendelson kinematics
Correct Answer: C
Rationale: Tumor growth typically follows Gompertzian kinetics where growth rate slows as the tumor size increases.
If the right coronary artery is blocked, which of the following will NOT be affected?
- A. Sinoatrial node
- B. Atrioventricular node
- C. Right bundle branch
- D. Left bundle branch
Correct Answer: D
Rationale: The left bundle branch is supplied by the left coronary artery, not the right, so it remains unaffected by a right coronary artery blockage.
The first sound of the heart beat results from
- A. the closing of the semilunar valves
- B. the closing of the atrioventricular valves
- C. the contraction of the atria
- D. the opening of the semilunar valves
Correct Answer: B
Rationale: The first heart sound ('lub') is caused by the closing of the AV valves at the start of ventricular systole.