Question Detail

ZOO 101 Gas Exchange and Respiration in Mammals Objective Question
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Question

What happens when the medulla oblongata detects rising CO₂ levels?
Options
A It decreases breathing rate
B It sends more nerve signals to breathing muscles
Correct Answer
C It stops sending signals to the diaphragm
D It constricts the bronchioles
Correct Answer

Option B is the correct answer.

Detailed Explanation

When CO₂ rises, the medulla sends more nerve signals to the diaphragm and intercostal muscles, causing them to contract more frequently and forcefully, increasing breathing rate.

Hint

This is a feedback mechanism to remove excess CO₂.

Question Info

Course: ZOO 101
Topic: Gas Exchange and Respiration in Mammals
Type: Objective
Difficulty: Not specified
Question 764 of 2214
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