Structure and Function of the Trachea Quiz
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Questions and Answers

What is the main function of the tracheal cartilage?

  • Assist in coughing
  • Traps foreign matter
  • Prevents collapse (correct)
  • Helps in removing debris

Which structure in the trachea is responsible for narrowing the airway?

  • Cilia
  • Goblet cells
  • Smooth muscle (trachealis) (correct)
  • C-shaped cartilage (tracheal rings)

What is the role of goblet cells in the trachea?

  • Prevent airway collapse
  • Assist in coughing
  • Help in removing debris with cilia
  • Trap foreign matter with mucus (correct)

Which component of the trachea assists in the removal of debris?

<p>Mucous membrane with cilia (A)</p> Signup and view all the answers

What is the main function of the muscle within the trachea?

<p>Assist in coughing (C)</p> Signup and view all the answers

What separates the two lungs in the thoracic cavity?

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

Which structure lines the pleural cavities?

<p>Parietal pleura (C)</p> Signup and view all the answers

How many lobes does the left lung consist of?

<p>2 (D)</p> Signup and view all the answers

Which lung structure is separated into bronchopulmonary segments?

<p>Right lung (B)</p> Signup and view all the answers

What is the function of the visceral pleura?

<p>Cover the outer surface of the lungs (C)</p> Signup and view all the answers

What is the main difference between bronchioles and terminal bronchioles?

<p>Greater amount of smooth muscle in terminal bronchioles (D)</p> Signup and view all the answers

How does the amount of cartilage present in primary bronchi compare to that in segmental bronchi?

<p>Primary bronchi have more cartilage (C)</p> Signup and view all the answers

What is the role of smooth muscle in the tracheobronchial tree?

<p>Providing structural support (A)</p> Signup and view all the answers

How many generations of branching are capable of changing diameter in the tracheobronchial tree?

<p>16 (D)</p> Signup and view all the answers

What distinguishes primary bronchi from terminal bronchioles in terms of structure?

<p>The presence of ciliated epithelium in primary bronchi (D)</p> Signup and view all the answers

What is the average diameter of alveoli?

<p>250µm (B)</p> Signup and view all the answers

Which part of the tracheobronchial tree has the highest number of alveoli?

<p>Alveolar sacs (D)</p> Signup and view all the answers

What is the main distinguishing feature between respiratory bronchioles and alveolar ducts?

<p>Presence of smooth muscle (C)</p> Signup and view all the answers

Which structure in the tracheobronchial tree is responsible for removing debris?

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

How many generations of branching occur from terminal bronchioles to alveolar sacs?

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

What is the primary function of the respiratory membrane in the lung?

<p>To facilitate gas diffusion during respiration (C)</p> Signup and view all the answers

Which component of the respiratory membrane contributes the most to the barrier for gas diffusion?

<p>Alveolar epithelium (D)</p> Signup and view all the answers

What role does the interstitial space play in the respiratory membrane?

<p>To provide a pathway for gas diffusion between alveoli and capillaries (B)</p> Signup and view all the answers

Which structure in the respiratory membrane is directly involved in nutrient exchange within the lung?

<p>Capillary endothelium basement membrane (D)</p> Signup and view all the answers

How does the thinness of the respiratory membrane benefit gas exchange in the lung?

<p>It allows for a faster rate of gas diffusion (C)</p> Signup and view all the answers

Qual es le effecto del contraction del diafragma durante le ventilation?

<p>Descende le diafragma. (B)</p> Signup and view all the answers

Qual es le effecto del contraction del musculos intercostal extern in le ventilation?

<p>Eleva le sternon. (B)</p> Signup and view all the answers

Qual es le function de tote musculos mentionate in le text in relation al ventilation?

<p>Promover le influxo de aere al pulmones. (D)</p> Signup and view all the answers

Quid succede al musculos abdominal durante le inspiration?

<p>Relaxa. (C)</p> Signup and view all the answers

Quid resulta del expansion del cavitate thoracic durant le inspiration?

<p>Influxo de aere al pulmones. (A)</p> Signup and view all the answers

What happens to the abdominal muscles during expiration?

<p>They contract (B)</p> Signup and view all the answers

In forced expiration, which muscles are primarily involved?

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

What is the role of external intercostals during quiet breathing?

<p>Relax to facilitate expiration (A)</p> Signup and view all the answers

Which muscle relaxes during quiet breathing?

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

How does contraction of thoracic cavity contribute to the breathing process?

<p>Expels air from the lungs (D)</p> Signup and view all the answers

What is the total lung capacity, including all volumes and capacities mentioned in the text?

<p>5800mL (D)</p> Signup and view all the answers

Which lung volume represents the air in the respiratory system that cannot be exhaled forcibly?

<p>Residual volume (B)</p> Signup and view all the answers

What is the term for the sum of inspiratory reserve volume and tidal volume?

<p>Inspiratory capacity (D)</p> Signup and view all the answers

Which lung capacity represents the maximum amount of air a person can exhale after a maximum inhalation?

<p>Vital capacity (C)</p> Signup and view all the answers

What lung volume represents the air that can be maximally inhaled after a normal inhalation?

<p>Inspiratory reserve volume (A)</p> Signup and view all the answers

What is the sum of Inspiratory reserve volume and Tidal volume?

<p>3500mL (A)</p> Signup and view all the answers

Which lung capacity represents the total amount of air that can be exhaled after a maximum inhalation?

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

What is the difference between Functional reserve capacity and Vital capacity?

<p>Functional reserve capacity includes Residual volume (B)</p> Signup and view all the answers

Which lung volume represents the air that remains in the respiratory system even after the most forceful exhalation?

<p>Residual volume (C)</p> Signup and view all the answers

What is the main effect of vagal innervation on bronchi/bronchioles?

<p>Promotes bronchoconstriction (D)</p> Signup and view all the answers

During exercise, what stimulates bronchodilation in the bronchi/bronchioles?

<p>Circulating Epinephrine (D)</p> Signup and view all the answers

What is the function of catecholamines released during exercise on the bronchi/bronchioles?

<p>Stimulating bronchodilation (B)</p> Signup and view all the answers

How does vagal innervation affect bronchi/bronchioles when foreign matter is inhaled?

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

What is the primary role of circulating Epinephrine on smooth muscle in the bronchi/bronchioles?

<p>Promoting relaxation (B)</p> Signup and view all the answers

What is the role of the Pontine Respiratory Group?

<p>Fine tunes breathing pattern and communicates with the Medullary Respiratory Center (D)</p> Signup and view all the answers

What is the main function of the Medullary Respiratory Center?

<p>Controls the frequency and depth of ventilation (B)</p> Signup and view all the answers

How does the Rhythmic Ventilation respond to external factors?

<p>Responds to blood gas, pH, and muscular movements (A)</p> Signup and view all the answers

What happens when the Ventral Respiratory Group receives input from other brain centers?

<p>Fine tunes breathing pattern (C)</p> Signup and view all the answers

What is the primary function of the Dorsal Respiratory Group within the Medullary Respiratory Center?

<p>Controls the frequency and depth of ventilation (B)</p> Signup and view all the answers

What is the primary function of the chemosensitive area in the medulla oblongata?

<p>Detecting hyper/hypo-capnia via changes in CO2 (B)</p> Signup and view all the answers

Which receptors are activated when there is a decrease in pH, an increase in CO2, and a decrease in O2?

<p>Carotid and Aortic Chemoreceptors (C)</p> Signup and view all the answers

What can change PCO2 resulting in altered ventilation rate?

<p>Cerebral input (C)</p> Signup and view all the answers

Which area responds more quickly to changes in pH?

<p>Carotid and Aortic Chemoreceptors (A)</p> Signup and view all the answers

How is hypercapnia defined?

<p>Increased CO2 in blood (D)</p> Signup and view all the answers

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