Assignment: calcium homeostasis
Assignment: calcium homeostasis
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Question 9.
The NP is teaching a group of older adults about the value of including foods containing antioxidants in their diet. Which of the following statements best captures the rationale underlying the NPs advice?
Antioxidants inhibit the actions of reactive oxygen species (ROS).
Antioxidants prevent the formation of superoxide dismutase.
Antioxidants react nonspecifically with molecules.
Antioxidants prevent the occurrence of cell dysplasia.
Question 10.
Which of the following statements most accurately conveys an aspect of cell injury due to impaired calcium homeostasis?
Normal intracellular calcium ion levels are higher than extracellular levels.
Ischemia and certain toxins cause a decrease in cytosolic calcium.
Injured cells tend to accumulate calcium.
Low calcium levels cause an activation of damaging enzymes.
Question 11.
The NP is providing care for a 21-year-old female patient with gas gangrene of a compound fracture in her arm. Which of the following assessment findings would the nurse most reasonably expect to find when caring for a patient with a diagnosis of gas gangrene?
Inflammation of the affected tissue
A positive culture for Staphylococcus
Spreading edema
Impaired alveolar gas exchange
Question 12.
A 45-year-old patient who experienced exposure to radiation during an industrial accident several years prior is being assessed. Which of the following phenomena may underlie the genetic changes that have been noted in the patient?
Base pairs may have been rearranged by the radiation exposure.
Endonucleases may have influenced the DNA structure following exposure.
Two paired bases may have exchanged helical positions after the accident.
The radiation may have produced redundant or degenerate genetic code.
Question 13.
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?
The trait is an expression of multiple alleles.
Epistasis has dictated the phenotypic outcome.
The phenomenon is an example of polygenic inheritance.
The outcome is the result of the interaction between collaborative genes.
