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When reviewing the purpose/action of neurotransmitters as they interact with different receptors, the nursing instructor gives an example using acetylcholine. When acetylcholine is released at the sinoatrial node in the right atrium of the heart, it is:
- A. positively charged.
- B. inhibitory.
- C. overstimulated.
- D. dormant.
Correct Answer: B
Rationale: Acetylcholine acts as an inhibitory neurotransmitter at the sinoatrial node. It slows down the heart rate by decreasing the firing rate of the sinoatrial node, which serves as the heart's natural pacemaker. Neurotransmitters do not have a charge, so choice A is incorrect. Choice C is wrong as overstimulation is not a characteristic of acetylcholine at the sinoatrial node. Choice D is also incorrect because acetylcholine actively influences heart rate regulation when released at the sinoatrial node.
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A male patient receiving androgen therapy is concerned about prostate cancer. What should the nurse explain about the risks associated with this therapy?
- A. Finasteride has been shown to reduce the risk of developing prostate cancer.
- B. Finasteride has no impact on the risk of developing prostate cancer.
- C. Finasteride may increase the risk of developing prostate cancer.
- D. Finasteride has no effect on the risk of prostate cancer.
Correct Answer: A
Rationale: The correct answer is A. Finasteride, a type of androgen therapy, has been shown to reduce the risk of developing prostate cancer. It works by shrinking the prostate gland, which can help lower the risk of developing prostate cancer. However, while it may reduce the risk, regular screening is still recommended to monitor for any potential issues. Choice B is incorrect because finasteride does have an impact on reducing the risk of prostate cancer. Choice C is incorrect as finasteride is not known to increase the risk of developing prostate cancer. Choice D is incorrect as finasteride does have an effect on reducing the risk of prostate cancer.
A male patient is receiving androgen therapy for hypogonadism. What laboratory tests should the nurse monitor during this therapy?
- A. Liver function tests
- B. Kidney function tests
- C. Prostate-specific antigen (PSA)
- D. Complete blood count (CBC)
Correct Answer: A
Rationale: During androgen therapy for hypogonadism, it is important to monitor liver function tests. Androgens can affect the liver, potentially leading to liver dysfunction. Monitoring liver function tests helps in early detection of any liver abnormalities. Kidney function tests (Choice B) are not typically affected by androgen therapy. Prostate-specific antigen (PSA) levels (Choice C) may be monitored for conditions like prostate cancer, but it is not directly related to androgen therapy for hypogonadism. A complete blood count (CBC) (Choice D) may not show specific changes related to androgen therapy for hypogonadism.
How are antibodies produced?
- A. B cells
- B. T cells
- C. Helper cells
- D. Memory cells
Correct Answer: A
Rationale: Antibodies are produced by B cells. B cells are specialized white blood cells that generate antibodies as part of the immune response. B cells differentiate into plasma cells that secrete antibodies. T cells play a role in cell-mediated immunity, not antibody production. Helper cells, or helper T cells, assist in activating B cells but do not directly produce antibodies. Memory cells store information about previous infections but do not actively produce antibodies.
A 60-year-old male patient presents with severe and persistent pain in his left leg and hip that worsens with activity. After further evaluation, the patient is diagnosed with osteosarcoma. Which of the following is true about osteosarcoma?
- A. It is more common in children and young adults.
- B. Early diagnosis improves the prognosis.
- C. It is frequently located in the leg bones.
- D. All of the above are true.
Correct Answer: D
Rationale: Osteosarcoma is a type of bone cancer that can be found in any bone but is most commonly located in the long bones of the legs. While it is more prevalent in children and young adults, it can also occur in older individuals like the 60-year-old male patient in this case. Early diagnosis is crucial for a better prognosis in osteosarcoma cases. Therefore, all the statements provided are true regarding osteosarcoma, making option D the correct answer. Option A is accurate as osteosarcoma is more common in children and young adults. Option B is correct as early diagnosis improves the prognosis. Option C is accurate as osteosarcoma is frequently located in the leg bones.
An immunology nurse is caring for a patient. While planning care, which principle will the nurse remember? The primary role of IgA1 is to prevent infections in the:
- A. Blood
- B. Kidneys
- C. Lungs
- D. Mucous membranes
Correct Answer: A
Rationale: The correct answer is A: Blood. IgA1 is mainly found in the blood and plays a crucial role in preventing infections by neutralizing pathogens. While IgA1 can be present in other body areas, its primary function is associated with preventing infections in the blood. Choices B, C, and D are incorrect as IgA1 is not primarily associated with the kidneys, lungs, or mucous membranes.