Respiratory System: Nose Function and Cilia
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Questions and Answers

What is the main factor that affects breathing rate?

  • CO2 concentration in the blood (correct)
  • Body temperature
  • Oxygen concentration in the blood
  • Blood pressure

What stimulates chemoreceptors to increase breathing?

  • High O2 levels
  • A large drop in O2 levels (correct)
  • Increased blood pH
  • Low CO2 levels

What is hypernea?

  • Breathing cessation
  • Increased rate and depth of breathing (correct)
  • Decreased rate and depth of breathing
  • Shortness of breath

Which type of blood has hemoglobin with a greater affinity for oxygen?

<p>Fetal blood (C)</p> Signup and view all the answers

At what altitude does altitude sickness typically start?

<p>8000 feet (C)</p> Signup and view all the answers

When does the development of respiratory bronchioles begin during embryonic development?

<p>Week 4 (D)</p> Signup and view all the answers

What is the main function of the nose in the respiratory system?

<p>To warm and humidify incoming air (C)</p> Signup and view all the answers

What is the function of cilia in the nose?

<p>To push mucus and debris towards the throat (C)</p> Signup and view all the answers

Which structure closes off the trachea while swallowing to ensure food goes to the esophagus?

<p>Epiglottis (A)</p> Signup and view all the answers

Where does gas exchange directly occur in the respiratory system?

<p>Respiratory bronchioles and alveoli (D)</p> Signup and view all the answers

What is the primary function of alveolar macrophages in the lungs?

<p>Protection against pathogens (C)</p> Signup and view all the answers

Which of the following describes the transpulmonary pressure?

<p>Difference between intrapleural pressure and intra-alveolar pressure (A)</p> Signup and view all the answers

What causes inspiration during pulmonary ventilation?

<p>Contractions of diaphragm and intercostal muscles (B)</p> Signup and view all the answers

Which term refers to a sequence of inspiration and expiration?

<p>Respiratory cycle (A)</p> Signup and view all the answers

'Tidal volume' is best described as:

<p>Amount of air entering lungs during normal breathing (A)</p> Signup and view all the answers

What does 'total lung capacity' refer to?

<p>Amount of air possible after a forceful inhalation (A)</p> Signup and view all the answers

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