ATI RN
Cardiovascular System Exam
1. What is the ability of cardiac cells to generate an electrical impulse without being stimulated by an external source?
- A. Automaticity
- B. Contractility
- C. Conductivity
- D. Refractoriness
Correct answer: A
Rationale: Automaticity is the correct answer because it refers to the inherent ability of cardiac cells to generate electrical impulses without the need for external stimulation. Contractility (Choice B) is the ability of the heart muscle to contract and generate force, not related to electrical impulse generation. Conductivity (Choice C) refers to the ability of cardiac cells to transmit electrical impulses from cell to cell, not the spontaneous generation of impulses. Refractoriness (Choice D) is the period during which the cardiac cells are recovering and not able to respond to a new stimulus, not the spontaneous generation of impulses.
2. The first successful intelligence test was originally constructed to __________.
- A. measure individual differences in IQ
- B. document age-related improvements in children's intellectual functioning
- C. identify children with learning problems who needed to be placed in special classes
- D. compare the scores of people who varied in gender, ethnicity, and birth order
Correct answer: C
Rationale: The first successful intelligence test, the Binet-Simon Scale, was originally developed to identify children with learning problems who required special educational interventions. Choice A is incorrect because measuring individual differences in IQ was not the primary purpose of the test. Choice B is incorrect because documenting age-related improvements in children's intellectual functioning was not the main goal of the test. Choice D is incorrect because comparing the scores of people based on gender, ethnicity, and birth order was not the intended use of the intelligence test.
3. What is this surgical procedure that restores blood flow to the heart by diverting blood around a blocked artery?
- A. Coronary artery bypass graft (CABG)
- B. Angioplasty
- C. Stent placement
- D. Valve replacement
Correct answer: A
Rationale: The correct answer is A, Coronary artery bypass graft (CABG), which is a surgical procedure to improve blood flow to the heart by redirecting blood around blocked or narrowed arteries. This procedure is specifically designed to bypass blocked coronary arteries, allowing blood to flow more freely to the heart muscle. Choices B, C, and D are incorrect because angioplasty involves opening up narrowed or blocked blood vessels, stent placement involves inserting a mesh tube to keep arteries open, and valve replacement involves replacing a damaged heart valve - none of which directly address diverting blood flow around a blocked artery.
4. A client diagnosed with major depressive disorder is receiving cognitive-behavioral therapy (CBT). Which outcome indicates that the therapy is effective?
- A. The client identifies and challenges negative thoughts.
- B. The client reports an increase in suicidal thoughts.
- C. The client experiences an increase in anxiety.
- D. The client shows no change in behavior.
Correct answer: A
Rationale: In cognitive-behavioral therapy (CBT), one of the primary objectives is to help clients identify and challenge their negative thoughts. This process allows the individual to reframe their thinking patterns and develop more adaptive coping strategies. Reporting an increase in suicidal thoughts (Choice B) or experiencing an increase in anxiety (Choice C) are not desired outcomes and may indicate a need for further intervention. Showing no change in behavior (Choice D) suggests that the therapy has not been effective. Therefore, the correct indicator of effective therapy in this context is the client's ability to identify and challenge negative thoughts (Choice A).
5. A community health nurse is reviewing primary prevention strategies for West Nile virus with a group of clients in a rural health clinic. Which of the following instructions should the nurse include?
- A. Avoid exposure to deer ticks.
- B. Eliminate areas of standing water.
- C. Use a respiratory mask when cleaning bird coops.
- D. Plan outdoor activities after dusk.
Correct answer: B
Rationale: The correct answer is B: 'Eliminate areas of standing water.' This is an essential primary prevention strategy for West Nile virus as it helps prevent the breeding of mosquitoes that spread the virus. Choices A, C, and D are incorrect. Avoiding exposure to deer ticks is more relevant for Lyme disease, using a respiratory mask when cleaning bird coops is not a primary prevention strategy for West Nile virus, and planning outdoor activities after dusk does not directly address the prevention of West Nile virus transmission.
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