Options For Animals Practice Test

What regulates BP & respiration?

Medulla oblongata Pons Cerebellum Thalamus

Correct Answer:

Medulla oblongata

Explanation:

Regulation of blood pressure and respiration is controlled by centers in the medulla oblongata. The cardiovascular center in the medulla adjusts heart rate and vascular tone to keep blood pressure within narrow limits, while the respiratory rhythmicity center produces the basic breathing pattern and tweaks rate and depth in response to chemical signals. It receives input from baroreceptors and chemoreceptors to maintain proper gas exchange and blood chemistry. The pons can modulate breathing, but the medulla houses the main centers for BP and respiration, making it the best answer. The cerebellum coordinates movement and balance, not autonomic regulation, and the thalamus mainly relays sensory information rather than controlling vital autonomic functions.

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