ATI RN
Cardiovascular System Practice Exam
1. This test measures the amount of blood the heart pumps with each beat, often used to assess heart function.
- A. Ejection fraction
- B. Cardiac output
- C. Stroke volume
- D. End-diastolic volume
Correct answer: A
Rationale: The correct answer is A: Ejection fraction. Ejection fraction is a measure of the percentage of blood that is pumped out of the left ventricle with each beat, used to assess heart function. Choice B, Cardiac output, is the total volume of blood pumped by the heart per minute and is not specific to each beat. Choice C, Stroke volume, is the amount of blood ejected by the heart in one contraction but does not specify the percentage of blood pumped out. Choice D, End-diastolic volume, is the volume of blood in the ventricle just before it contracts and does not directly measure the blood pumped with each beat.
2. What is the main purpose of a healthcare proxy?
- A. To manage financial affairs
- B. To make medical decisions on behalf of the patient
- C. To provide legal representation
- D. To oversee patient discharge planning
Correct answer: B
Rationale: The main purpose of a healthcare proxy is to make medical decisions on behalf of the patient when they are unable to do so. Choice A is incorrect as managing financial affairs is typically handled by a power of attorney for finances. Choice C is incorrect as a healthcare proxy is not meant to provide legal representation. Choice D is incorrect as overseeing patient discharge planning is a responsibility of healthcare providers, not a healthcare proxy.
3. A report comes back indicating that muscular atrophy has occurred. A nurse recalls that muscular atrophy involves a decrease in muscle cell size:
- A. Number
- B. Size
- C. Vacuoles
- D. Lipofuscin
Correct answer: B
Rationale: The correct answer is B: Size. Muscular atrophy is characterized by a reduction in the size of muscle cells. This decrease in size can be due to various factors such as disuse, aging, or disease. Choice A, Number, is incorrect because muscular atrophy does not involve a decrease in the number of muscle cells but rather their size. Choice C, Vacuoles, is incorrect as vacuoles are not directly related to the definition of muscular atrophy. Choice D, Lipofuscin, is incorrect as lipofuscin is a pigment associated with aging and has no direct connection to the decrease in muscle cell size seen in muscular atrophy.
4. Which statement by an 18-year-old woman vaccinated with Gardasil indicates that more teaching is necessary?
- A. This vaccination will cure the HPV infection I got when I was 16.
- B. I will still need to have a routine Pap screen performed.
- C. Gardasil can prevent genital warts in males and females.
- D. This drug does not protect against all types of HPV.
Correct answer: A
Rationale: The correct answer is A because Gardasil does not cure existing HPV infections. Gardasil is a preventive vaccine and does not treat existing infections. Choice B is correct as regular Pap screenings are still necessary even after vaccination. Choice C is also correct as Gardasil can prevent genital warts. Choice D is correct as Gardasil does not protect against all types of HPV. Therefore, option A is the statement that indicates the need for more teaching.
5. Which organ has the greatest effect on fluid output?
- A. Kidneys
- B. Lungs
- C. Skin
- D. Intestines
Correct answer: A
Rationale: The correct answer is the kidneys. The kidneys are primarily responsible for regulating fluid balance by filtering blood and adjusting the volume and concentration of urine. The lungs primarily regulate gas exchange, not fluid balance. The skin plays a role in temperature regulation and protection but is not the primary organ for fluid output. The intestines are mainly involved in the absorption of nutrients and water, rather than fluid output.
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