Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
Which of the following processes produces ATP?
A. cellular respiration
Cellular respiration: Cellular respiration (glycolysis, Krebs cycle, oxidative phosphorylation) produces ATP
B. external respiration
External respiration: External respiration is gas exchange between lungs and blood, not the ATP-producing biochemical process
C. ventilation
Ventilation: Ventilation (breathing) moves air in/out of lungs but does not itself synthesize ATP
D. internal respiration
Internal respiration: Internal respiration is gas exchange between blood and tissues, not the intracellular ATP-producing pathways
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Full Explanation
A. Cellular respiration: Cellular respiration (glycolysis, Krebs cycle, oxidative phosphorylation) produces ATP
B. External respiration: External respiration is gas exchange between lungs and blood, not the ATP-producing biochemical process
C. Ventilation: Ventilation (breathing) moves air in/out of lungs but does not itself synthesize ATP
D. Internal respiration: Internal respiration is gas exchange between blood and tissues, not the intracellular ATP-producing pathways
Similar Questions
The three major cartilages of the larynx include the thyroid cartilage, the cricoid cartilage, and the
Full Explanation
A. Glottal: The glottis refers to the vocal apparatus/opening, not a cartilage
B. Tracheal: Tracheal cartilage are rings of the trachea, not one of the three major laryngeal cartilages
C. Epiglottal: The epiglottic (epiglottal) cartilage forms the epiglottis, and along with thyroid and cricoid cartilages is considered a major laryngeal cartilage -correct (choice corresponds to epiglottic cartilage).
D. Hyoidal: The hyoid is a bone (not one of the larynx’s three major cartilages) that supports the larynx
How is the majority of oxygen transported in the blood?
A. Bound to the globin portion of hemoglobin
Bound to the globin portion of hemoglobin: Oxygen binds the heme (iron) portion, not the globin protein chains
B. Dissolved in the plasma
Dissolved in the plasma: Only a small fraction (~1.5%) of O₂ is dissolved in plasma
C. Bound to the heme portion of hemoglobin
Bound to the heme portion of hemoglobin: Most O₂ (~98–99%) is carried as oxyhemoglobin bound to heme iron
D. In the form of bicarbonate and water
In the form of bicarbonate and water: Bicarbonate transport applies to CO₂, not O₂
Full Explanation
A. Bound to the globin portion of hemoglobin: Oxygen binds the heme (iron) portion, not the globin protein chains
B. Dissolved in the plasma: Only a small fraction (~1.5%) of O₂ is dissolved in plasma
C. Bound to the heme portion of hemoglobin: Most O₂ (~98–99%) is carried as oxyhemoglobin bound to heme iron
D. In the form of bicarbonate and water: Bicarbonate transport applies to CO₂, not O₂
A mother and two young children are found passed out in their apartment, where a space heater is on. Emergency medical technicians suspect carbon monoxide poisoning. Why is carbon monoxide dangerous?
A. It causes extreme depression of the respiratory rate.
It causes extreme depression of the respiratory rate: CO binds hemoglobin and impairs O₂ delivery; respiratory depression is not the primary danger
B. It drastically decreases the pH of the blood.
It drastically decreases the pH of the blood: CO poisoning does not primarily cause a dramatic blood pH drop
C. It binds to the oxygen-binding site on hemoglobin, so the O2-carrying ability of the blood is reduced.
It binds to the oxygen-binding site on hemoglobin, so the O₂-carrying ability of the blood is reduced: CO binds avidly to hemoglobin’s heme sites, displacing O₂ and reducing oxygen carriage and delivery
D. It triggers hyperventilation, causing a severe drop in PCO2 and increase in blood pH.
It triggers hyperventilation, causing a severe drop in PCO₂ and increase in blood pH: Hyperventilation is not the main mechanism of CO toxicity
Full Explanation
A. It causes extreme depression of the respiratory rate: CO binds hemoglobin and impairs O₂ delivery; respiratory depression is not the primary danger
B. It drastically decreases the pH of the blood: CO poisoning does not primarily cause a dramatic blood pH drop
C. It binds to the oxygen-binding site on hemoglobin, so the O₂-carrying ability of the blood is reduced: CO binds avidly to hemoglobin’s heme sites, displacing O₂ and reducing oxygen carriage and delivery
D. It triggers hyperventilation, causing a severe drop in PCO₂ and increase in blood pH: Hyperventilation is not the main mechanism of CO toxicity