객관식
What does the hydrologic cycle describe?
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1. Introduction to Biology
Introduction to Biology
객관식
Which of the following stimuli is the most powerful respiratory stimulant to increase respiration in humans?
A
Increased levels of carbon dioxide (\(\mathrm{CO_2}\)) in the blood
B
Increased blood pH (alkalosis)
C
Decreased levels of oxygen (\(\mathrm{O_2}\)) in the blood
D
Decreased body temperature
검증된 단계별 안내1
Understand the role of respiratory stimulants: The respiratory system is regulated by the brainstem, specifically the medulla oblongata and pons, which respond to changes in blood chemistry to maintain homeostasis.
Recognize the primary respiratory stimulant: Increased levels of carbon dioxide (\(\mathrm{CO_2}\)) in the blood are the most powerful respiratory stimulant because they lead to a decrease in blood pH (acidosis), which triggers chemoreceptors to increase the rate and depth of breathing.
Evaluate the role of blood pH: Increased blood pH (alkalosis) typically reduces respiratory drive because it indicates lower levels of \(\mathrm{CO_2}\), which is not a strong stimulant for respiration.
Consider oxygen levels: Decreased levels of oxygen (\(\mathrm{O_2}\)) in the blood can stimulate respiration, but this effect is secondary to \(\mathrm{CO_2}\) levels and only becomes significant during severe hypoxia.
Analyze body temperature: Decreased body temperature generally slows metabolic processes and reduces respiratory drive, making it the least relevant factor in this context.
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