18 Questions
What part of the brain is responsible for sending nerve impulses to contract muscles for inspiration?
Medulla oblongata
Which feedback mechanism inhibits the breathing center when the lungs fill up?
Stretch receptors in the lungs
What happens when CO2 levels increase in the body?
Breathing rate and depth increase
During external respiration, where does carbon dioxide diffuse to?
Out of plasma into the lungs
In which process do oxygen leave the blood and carbon dioxide enter the blood in the tissues?
Internal Respiration
What is responsible for protecting us from infectious agents in the respiratory tract?
Mucus covering
What is the main factor that regulates the activity of inspiration?
Carbon dioxide levels in the blood
Which muscles are involved in the process of inspiration?
Intercostal muscles
What is the function of the external intercostal muscles during expiration?
Help in air expulsion by pushing air out
Which volume of air represents the small amount of air moving in and out with each breath?
Tidal volume
What is the function of residual volume in the lungs?
Remains in the lungs after exhalation
How is vital capacity visualized?
$4800$ mL equals tidal volume plus inspiratory reserve volume plus expiratory reserve volume
What is the function of the initial air passages in the respiratory system?
To warm, filter, and moisten incoming air
Which structure covers the opening to the trachea during swallowing?
Epiglottis
How does the volume of sound produced by the vocal cords vary?
By varying the thickness of the vocal cords
Where does tear drainage lead to in the respiratory system?
Nasal cavities
What determines the pitch of an individual's voice in the respiratory system?
The length and elasticity of the vocal cords
Which part of the respiratory system is responsible for producing sound?
Larynx
Test your knowledge on how the respiratory control center in the brain regulates breathing through nerve impulses, the role of stretch receptors, chemical receptors, and factors related to Sudden Infant Death Syndrome (SIDS). Explore how the nervous system monitors CO2, O2, and H+ levels to maintain proper breathing.
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