Unit 1,2,3,4 & 5: MN 553/ MN553 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A

Unit 1,2,3,4 & 5: MN 553/ MN553 (Latest 2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A Unit 1 Q: An infant who is four days postpartum has been diagnosed with a single-gene disorder. The parents of the child have a number of questions about the etiology of the health problem, which the physician is attempting to address in detail. Which of the following teaching points most accurately captures an aspect of single-gene congenital disorders? A. Affected genes are present on autosomal chromosomes rather than sex chromosomes. B. The majority of single-gene disorders manifest near the time of puberty. C. Single-gene disorders are associated with existing rather than new mutations. D. A particular defect can be caused by mutations at one of several different loci. Answer: D. A particular defect can be caused by mutations at one of several different loci. Q: A child possesses a trait that is the result of the interaction of two different genes, neither of which could have produced the trait independently. Which of the following explanations best captures the genetic explanation for this? A. The trait is an expression of multiple alleles. B. Epistasis has dictated the phenotypic outcome. C. The outcome is the result of the interaction between collaborative genes. D. The phenomenon is an example of polygenic inheritance. Answer: C. The outcome is the result of the interaction between collaborative genes. Q: A 6-year-old girl with a diagnosis of Marfan syndrome is being assessed at a community health clinic. Which of the following assessments would be the health care professional's lowest priority? A. A test of the child's visual acuity B. A musculoskeletal assessment C. Cardiovascular assessment D. Tests of kidney function Answer: D. Tests of kidney function Q: A student nurse practitioner asks her preceptor about the origins of different tissues, and their cellular origins during the process of development. Which of the following statements by the preceptor best describes the process of cell differentiation? A. "Cells of the hematopoietic system produce the appropriate body cells that are required at each stage of development." B. "A single stem cell differentiates into approximately 200 different types of cells." C. "Cells differentiate into necessary body cells, peaking after conception, and ceasing near the time of birth." D. "A fertilized ovum undergoes a series of divisions, yielding many different cell types." Answer: D. "A fertilized ovum undergoes a series of divisions, yielding many different cell types." Q: The family of a 68-year-old man who is in the end stages of small cell lung cancer is distraught at his visible body wasting that has worsened in recent weeks. Which of the following phenomena best accounts for the patient's anorexia and cachexia? A. Inadequate cellular metabolism of glucose results from tumor factors B. High fat losses coupled with preservation of muscle mass exaggerate the appearance of wasting C. Inadequate food intake due to symptoms and treatment results in loss of both muscle and fat D. Products of the tumor itself as well as a hypermetabolic state cause cachexia Answer: D. Products of the tumor itself as well as a hypermetabolic state cause cachexia Q: A group of researchers has identified that the prevalence of two particular genetic disorders share a statistical correlation. Which of the following statements best conveys the genetic rationale for this situation? A. There is likely a cause-and-effect relationship between the two genes responsible. B. The chromosomes containing each gene are likely closely situated. C. The disorders likely share the same locus. D. The genes causing each disorder are likely in the same section of the same chromosome. Answer: D. The genes causing each disorder are likely in the same section of the same chromosome. Q: A 77-year-old male patient with a diagnosis of stomach cancer has been found to have metastases in his liver. The patient and his family are surprised at this turn of events, stating that they don't see how he could have developed cancer in his liver. Which of the following facts would underlie the reply that the care team provides? A. The parenchymal tissue of the liver is particularly susceptible to secondary malignancies. B. The portal circulatory system brings venous blood from the gastrointestinal tract into the liver. C. The proximity of the liver to the stomach allows for direct spread of cancerous cells due to a lack of contact inhibition. D. Hepatic stromal tissue shares characteristics with cancerous cells, including lack of anchorage dependence. Answer: B. The portal circulatory system brings venous blood from the gastrointestinal tract into the liver. Q: The nurse practitioner is providing care for a patient with a diagnosis of cirrhosis, and he notes that the patient's sclerae are jaundiced. The nurse practitioner recalls that jaundice is caused by excess accumulation of bilirubin, a pigment that can accumulate in which part of the cell? A. Nucleus B. Cytoplasm C. Rough endoplasmic reticulum (ER) D. Golgi apparatus Answer: B. Cytoplasm Q: A nurse practitioner employed in the emergency department admits a patient who has experienced severe frostbite to his hands and toes after becoming lost on a ski trail. The NP recognizes that which of the following phenomena has caused the tissue damage? A. Decreased blood viscosity has resulted in interstitial bleeding. B. Reactive vasodilation has compromised perfusion. C. Decreased blood flow has induced hypoxia. D. Autonomic nervous stimulation has resulted in injury Answer: C. Decreased blood flow has induced hypoxia.