Biology Chapter on Respiratory System
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Questions and Answers

What is the primary function of the respiratory system?

  • Regulating body temperature
  • Digestion of food
  • Exchange of gases between the atmosphere and body cells (correct)
  • Transporting nutrients in the bloodstream

    • Which part of the respiratory system includes the nasal cavity and the larynx?

  • Alveolar system
  • Pleural cavity
  • Upper respiratory system (correct)
  • Lower respiratory system

    • What is the role of the nasal hairs in the respiratory system?

  • To regulate airflow
  • To trap dust and particles from inhaled air (correct)
  • To produce mucus
  • To aid in the exchange of gases

    • Which of the following statements best describes respiration?

    <p>The exchange of oxygen and carbon dioxide between the atmosphere and body cells</p> Signup and view all the answers

    Which structure does air pass through first before entering the lungs?

    <p>Trachea</p> Signup and view all the answers

    What is the primary function of the mucus in the nasal cavity?

    <p>To trap particles and dust</p> Signup and view all the answers

    Which part of the throat is directly behind the nasal cavity?

    <p>Nasopharynx</p> Signup and view all the answers

    How does the nasal mucosa contribute to air quality before it reaches the trachea?

    <p>By moistening and filtering the air</p> Signup and view all the answers

    What tissue is found in the nasopharynx that helps fight infections?

    <p>Lymphoid tissue</p> Signup and view all the answers

    What separates the nasal cavity from the oral cavity?

    <p>Hard palate</p> Signup and view all the answers

    What structure connects the nose to the mouth and allows breathing through the nose?

    <p>Nasopharynx</p> Signup and view all the answers

    Which component is responsible for the distribution of smell to the brain?

    <p>Olfactory nerve</p> Signup and view all the answers

    What is a key characteristic of the air that travels over the mucosa in the nasal cavity?

    <p>It saturates with water</p> Signup and view all the answers

    What is the primary function of the oropharynx?

    <p>To transport food and air to appropriate passages</p> Signup and view all the answers

    Which structure acts as a barrier to prevent food and liquids from entering the lungs?

    <p>Epiglottis</p> Signup and view all the answers

    What type of cartilage makes up the thyroid and cricoid cartilages found in the larynx?

    <p>Hyaline cartilage</p> Signup and view all the answers

    What is the role of cilia found in the bronchioles?

    <p>To remove debris and microbes from the air</p> Signup and view all the answers

    Which of the following is NOT one of the three types of bronchioles?

    <p>Segmental bronchioles</p> Signup and view all the answers

    What happens to the air passage during swallowing?

    <p>Airflow is momentarily halted</p> Signup and view all the answers

    What is a characteristic of the bronchi compared to the bronchioles?

    <p>Less smooth muscle and more cartilage</p> Signup and view all the answers

    Which area serves as a major drainage path for lymphatic fluids?

    <p>Throat</p> Signup and view all the answers

    Where does gas exchange primarily occur in the lungs?

    <p>In the alveoli</p> Signup and view all the answers

    What is the role of the pleural cavity?

    <p>To create a potential space between the pleurae</p> Signup and view all the answers

    How many lobes does the right lung have?

    <p>3 lobes</p> Signup and view all the answers

    What is the primary function of the lungs?

    <p>To perform gaseous exchange</p> Signup and view all the answers

    What separates the lobes of the lungs?

    <p>Fissures</p> Signup and view all the answers

    What does each bronchopulmonary segment contain?

    <p>An artery and a tertiary bronchus</p> Signup and view all the answers

    How does the autonomic nervous system influence the lungs?

    <p>By causing airway constriction and dilation</p> Signup and view all the answers

    What unique feature does the left lung have?

    <p>The cardiac notch</p> Signup and view all the answers

    What is the primary function of the pulmonary artery?

    <p>It carries deoxygenated blood to the alveoli.</p> Signup and view all the answers

    What structure forms the respiratory membrane?

    <p>The wall of the alveoli and the capillary wall.</p> Signup and view all the answers

    Which intercostal muscles are primarily responsible for inhalation?

    <p>External intercostal muscles.</p> Signup and view all the answers

    What is the hilum in relation to the lungs?

    <p>The region where blood vessels and nerves enter and exit the lungs.</p> Signup and view all the answers

    How do the pulmonary veins function after the blood is oxygenated?

    <p>They drain oxygenated blood from the alveoli.</p> Signup and view all the answers

    Which rib pairs are classified as floating ribs?

    <p>Last two pairs.</p> Signup and view all the answers

    What occurs during the process of expiration?

    <p>The lungs contract and air is expelled.</p> Signup and view all the answers

    Which of the following statements about the intercostal muscles is true?

    <p>Intercostal muscles sit outside, between, and inside the ribs.</p> Signup and view all the answers

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