Question

38 minutes remaining 31 of 50 questions remaining the rhythm of breathing is controlled in the: a medulla b hypothalamus c pons d cerebellum question 22 1 point where does the majority of oxygen and carbon dioxide exchange occur in the respiratory system? a trachea b bronchi last saved 10:35:37 pm questions filter (50)

Explanation:

For the first question, the medulla oblongata contains the respiratory center that controls the rhythm of breathing. The hypothalamus is involved in regulating body temperature, hunger, etc. The pons helps in regulating the rate of respiration but the main rhythm - controlling center is in the medulla. The cerebellum is mainly for balance and coordination.
For the second question, the majority of oxygen and carbon - dioxide exchange occurs in the alveoli (not listed here, but among the given options, the bronchi are part of the conducting airways. The trachea is also a conducting airway. However, if we assume a mis - listing and consider the fact that gas exchange occurs in the respiratory zone which is after the bronchi (in alveoli), but among the given options, bronchi are more related to the lower respiratory tract where gas - exchange - related structures (alveoli) are attached compared to the trachea which is more of an upper - level conducting airway.

Answer:

A. Medulla
B. Bronchi