Breathing rate in mammals is controlled by a part of the brain called the:

Breathing rate in mammals is controlled by a part of the brain called the medulla oblongata.

Here are the steps to understand this process:

1. Detection of CO2 Levels: Chemoreceptors in the body detect the levels of carbon dioxide (CO2) in the blood. High levels of CO2 result in a lower pH (more acidic blood).

2. Signal Transmission: These chemoreceptors send signals to the medulla oblongata, which is located in the brainstem.

3. Medulla Oblongata Response: The medulla oblongata processes these signals and determines the need to adjust the breathing rate.

4. Activation of Respiratory Muscles: The medulla oblongata sends nerve impulses to the respiratory muscles, such as the diaphragm and intercostal muscles.

5. Adjustment of Breathing Rate: These muscles contract and relax to increase or decrease the breathing rate, thereby regulating the levels of CO2 and oxygen in the blood.

By controlling the breathing rate, the medulla oblongata helps maintain homeostasis in the body.