Which of the following are reasons that people breath more rapidly when exercising? Select all that apply.
Increase in need for 02
Decrease in need for 02
Increase in CO2 levels
Increase in RBC production
Decrease in CO2 levels
Correct Answer : A,C
A. Increase in need for O₂: Muscles need more oxygen during exercise, so respiratory rate increases.
B. Decrease in need for O₂: This is incorrect; oxygen needs increase during exercise.
C. Increase in CO₂ levels: Exercise produces more CO₂, which stimulates breathing.
D. Increase in RBC production: This occurs over time in response to chronic hypoxia, not acutely during exercise.
E. Decrease in CO₂ levels: CO₂ levels rise during exercise, prompting faster breathing, not decrease.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Hyperventilating: this means rapid, deep breathing.
B. Having difficulty breathing: that is dyspnea.
C. Experiencing Kussmaul respirations: that’s deep, labored breathing, often seen in metabolic acidosis.
D. Not breathing: apnea means absence of breathing.
Correct Answer is B
Explanation
A. Bronchioles: Smaller branches that come after the bronchi.
B. Bronchi: Correct; the trachea divides into the right and left main (primary) bronchi.
C. Alveoli: Terminal ends of the respiratory tract where gas exchange occurs.
D. Nares: External nostrils, not connected directly to the trachea.
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