Question Detail

ZOO 101 Gas Exchange and Respiration in Mammals Objective Question
Take CBT

Question

What is the most important chemical stimulus that regulates breathing rate?
Options
A Oxygen levels
B Carbon dioxide levels
Correct Answer
C Nitrogen levels
D Glucose levels
Correct Answer

Option B is the correct answer.

Detailed Explanation

Carbon dioxide levels are the most important stimulus. When CO₂ rises, blood pH drops, and the brain increases breathing rate and depth to remove excess CO₂.

Hint

This gas's concentration directly affects blood pH.

Question Info

Course: ZOO 101
Topic: Gas Exchange and Respiration in Mammals
Type: Objective
Difficulty: Not specified
Question 761 of 2214
Previous Course Details Next