Human Anatomy Chapter 22: The Respiratory System

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Questions and Answers

Where is the respiratory center located in the brain?

  • Cerebrum
  • Pons
  • Cerebellum
  • Reticular formation of the medulla oblongata (correct)

What is the function of chemoreceptors in the respiratory system?

  • Regulating heart rate based on blood pressure
  • Detecting sound waves in the ear
  • Detecting light in the eye
  • Regulating breathing rate based on oxygen levels (correct)

Where are peripheral chemoreceptors located?

  • In the lungs
  • In the diaphragm
  • In the brain stem
  • In the aortic arch and carotid bodies (correct)

What is a characteristic of asthma attacks?

<p>Contraction of bronchiole smooth muscle (D)</p> Signup and view all the answers

What is a risk factor for chronic obstructive pulmonary disease (COPD)?

<p>History of smoking (D)</p> Signup and view all the answers

How does the respiratory system change with aging?

<p>The number of glands in the nasal mucosa declines (D)</p> Signup and view all the answers

What occurs when the diaphragm contracts during inspiration?

<p>The diaphragm descends (C)</p> Signup and view all the answers

During quiet expiration, what happens to the inspiratory muscles?

<p>They relax (D)</p> Signup and view all the answers

What is the primary function of the scalenes, sternocleidomastoid, and pectoralis minor muscles during deep inspiration?

<p>To elevate the ribs (B)</p> Signup and view all the answers

What occurs to the thoracic cavity volume during forced expiration?

<p>It decreases (D)</p> Signup and view all the answers

What is the primary function of the oblique and transversus abdominis muscles during forced expiration?

<p>To contract the abdominal wall (A)</p> Signup and view all the answers

What is the effect of external intercostal muscle contraction during inspiration?

<p>Ribs are elevated and sternum is flared (C)</p> Signup and view all the answers

What is the main function of the nasal cavity?

<p>Warms and humidifies the air (C)</p> Signup and view all the answers

What type of epithelium lines the nasal cavity?

<p>Pseudostratified ciliated columnar epithelium (C)</p> Signup and view all the answers

What is the function of the olfactory mucosa?

<p>Houses olfactory receptors (B)</p> Signup and view all the answers

What is the function of the paranasal sinuses?

<p>Same air-processing functions as nasal cavity (C)</p> Signup and view all the answers

What is the function of the pharynx?

<p>Funnel-shaped passageway connecting nasal cavity and mouth (B)</p> Signup and view all the answers

What is the function of the larynx?

<p>Provides an open airway and routes air and food into the proper channels (A)</p> Signup and view all the answers

What is the function of the trachea?

<p>Divides into two main bronchi (D)</p> Signup and view all the answers

What is the function of the bronchi?

<p>Extensively branching respiratory passageways (B)</p> Signup and view all the answers

What is the function of the alveoli?

<p>Gas exchange occurs between the air and blood (B)</p> Signup and view all the answers

What is the function of the pleurae?

<p>A double-layered sac surrounding each lung (B)</p> Signup and view all the answers

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Related Documents

Chapter 21 (Respiratory System) PDF

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