5 Questions
What is the function of the respiratory center in the brain?
Setting a basic rhythm for breathing
Where does gas exchange occur in the lungs?
Alveoli
What is the primary gas exchanged during respiration?
Oxygen (O2)
What causes the diaphragm to contract and draw air into the body?
Creation of negative pressure
What is the function of the bronchioles in the respiratory system?
Branching to end in alveolar sacs for gas exchange
Study Notes
Respiratory System Functions
- The respiratory center in the brain is responsible for regulating breathing, controlling the rate and depth of inhalation and exhalation.
Gas Exchange in Lungs
- Gas exchange occurs in the lungs at the alveoli, tiny air sacs where oxygen from the inhaled air diffuses into the bloodstream and carbon dioxide is removed.
Primary Gas Exchanged
- Oxygen is the primary gas exchanged during respiration, where it is inhaled into the lungs and then transported to the body's cells.
Diaphragm Contraction
- The diaphragm contracts and draws air into the body due to the stimulation of the phrenic nerve, which originates in the brain and extends to the diaphragm.
Bronchioles Function
- The bronchioles are small airways that branch off from the bronchi and lead to the alveoli, serving as a conduit for air to reach the site of gas exchange in the lungs.
Test your knowledge of the circulatory and respiratory systems with this quiz. Learn about the passage of air to the lungs, the function of the circulatory system, the cardiac cycle, and blood flow through the body.
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