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Multiple Choice
If a person's tidal volume decreases, but his or her respiratory rate remains unchanged, what is the most likely effect on the person's minute ventilation?
A
Minute ventilation will decrease.
B
Minute ventilation will remain the same.
C
Minute ventilation will double.
D
Minute ventilation will increase.
Verified step by step guidance
1
Understand the concept of tidal volume: Tidal volume is the amount of air inhaled or exhaled during a normal breath. It is a key factor in determining minute ventilation.
Understand the concept of respiratory rate: Respiratory rate is the number of breaths taken per minute. Minute ventilation is calculated by multiplying tidal volume by respiratory rate.
Write the formula for minute ventilation:
Analyze the scenario: If tidal volume decreases while respiratory rate remains unchanged, the product of tidal volume and respiratory rate will decrease, leading to a decrease in minute ventilation.
Conclude the effect: Based on the formula and analysis, the most likely effect is that minute ventilation will decrease.