Respiratory System Presentation
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Questions and Answers

What is the function of the pneumotaxic area?

  • Helps in rhythm regulation of the inspiratory area (correct)
  • Regulates voluntary control of respiratory pattern
  • Monitors levels of CO2, O2, and H+
  • Stimulates the inspiratory area to activate and prolong inhalation

Where is the medullary rhythmicity area located?

  • In the respiratory center
  • In the cortex
  • In the upper pons
  • In the medulla oblongata (correct)

Where are the peripheral chemoreceptors located?

  • Medulla oblongata
  • Central nervous system
  • Aortic bodies and carotid bodies (correct)
  • Upper pons

What is the function of the inflation (Hering-Breuer) reflex?

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

What is the role of the respiratory system in homeostasis?

<p>Maintaining blood pH within a narrow range (B)</p> Signup and view all the answers

How do the body's cells use oxygen?

<p>To release energy from nutrient molecules (C)</p> Signup and view all the answers

In the cooperation between the cardiovascular and respiratory systems, what is the specific role of the respiratory system?

<p>Eliminating CO2 and supplying O2 for gas exchange (D)</p> Signup and view all the answers

What happens when large amounts of CO2 are produced by metabolic reactions?

<p>Blood pH becomes more acidic (C)</p> Signup and view all the answers

What is the average pH of body fluids in a healthy individual?

<p>7.40 (D)</p> Signup and view all the answers

How does the respiratory system contribute to the production of ATP?

<p>By providing for the exchange of gases between the atmosphere and blood (D)</p> Signup and view all the answers

Which cellular process is known to consume O2 and produce CO2?

<p>Krebs cycle (B)</p> Signup and view all the answers

What is the volume of air remaining in the lungs that cannot be measured?

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

What is the process of gas exchange between the alveoli of the lungs and the blood in pulmonary capillaries called?

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

Where does the exchange of O2 and CO2 between the air spaces in the lungs and the blood take place?

<p>In the alveolar walls (D)</p> Signup and view all the answers

What is the primary function of alveolar macrophages?

<p>Phagocytosis of dust particles (A)</p> Signup and view all the answers

What causes air to flow into the lungs during inhalation?

<p>Decrease in alveolar pressure (B)</p> Signup and view all the answers

What is the main function of bronchial arteries?

<p>Perfuse the muscular walls of bronchi and bronchioles (B)</p> Signup and view all the answers

What is the total lung capacity for an average adult male?

<p>$6000$ mL (A)</p> Signup and view all the answers

Which gas law states that each gas in a mixture of gases exerts its own pressure as if no other gases are present?

<p>Dalton's Law (B)</p> Signup and view all the answers

What is the additional amount of air taken by a deep breath called?

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

What is considered an active process during pulmonary ventilation?

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

What does minute ventilation (MV) represent?

<p>Total air inhaled and exhaled per minute (A)</p> Signup and view all the answers

Which of the following best describes Henry's Law?

<p>The quantity of a gas that will dissolve in a liquid is directly proportional to the partial pressure of the gas and its solubility. (A)</p> Signup and view all the answers

In which body fluid does a gas stay in solution more effectively when its partial pressure is higher?

<p>Blood plasma (B)</p> Signup and view all the answers

Why is much more CO2 dissolved in blood plasma compared to O2?

<p>CO2 has a higher solubility in water than O2. (B)</p> Signup and view all the answers

Where does external respiration take place?

<p>Alveoli of the lungs (C)</p> Signup and view all the answers

What is the most important factor that determines how much O2 binds to hemoglobin?

<p>Partial pressure of O2 (PO2) (C)</p> Signup and view all the answers

When does hemoglobin become fully saturated with O2?

<p>When PO2 is low (A)</p> Signup and view all the answers

How does an increase in acidity affect the affinity of hemoglobin for O2?

<p>It decreases the affinity for O2 (C)</p> Signup and view all the answers

What happens to the oxygen-hemoglobin dissociation curve when PCO2 increases?

<p>It shifts to the right (A)</p> Signup and view all the answers

What happens to the oxygen-hemoglobin dissociation curve when temperature increases?

<p>It shifts to the right (B)</p> Signup and view all the answers

What is the substrate found in RBC that decreases the affinity of hemoglobin for O2 and helps unload O2 from hemoglobin?

<p>3-bisphosphoglycerate (BPG) (A)</p> Signup and view all the answers

What percentage of CO2 is transported in blood plasma as bicarbonate ions?

<p>70% (A)</p> Signup and view all the answers

Where are clusters of neurons located that send nerve impulses for altering the size of the thorax?

<p>Medulla oblongata and pons (A)</p> Signup and view all the answers

Which of the following structures is considered part of the Lower Respiratory System?

<p>Terminal Bronchioles (B)</p> Signup and view all the answers

What is the main function of the epiglottis during swallowing?

<p>Preventing food from entering the larynx (C)</p> Signup and view all the answers

Which type of epithelial cells is considered the main site for gas exchange in the alveoli?

<p>Simple squamous epithelial cells (C)</p> Signup and view all the answers

Which of the following structures is composed of nine pieces of cartilage?

<p>Thyroid Cartilage (Adam’s Apple) (C)</p> Signup and view all the answers

What is the function of the conducting zone in the respiratory system?

<p>Filter, warm, and moisten air and conduct it into the lungs (A)</p> Signup and view all the answers

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

<p>Conduct air into the lungs (C)</p> Signup and view all the answers

What happens to the plates of cartilage as the bronchial structure changes?

<p>They gradually disappear in the distal bronchioles. (D)</p> Signup and view all the answers

What is the function of Type II Alveolar Cells in the alveoli?

<p>Secrete alveolar fluid to keep surface between cells and air moist. (B)</p> Signup and view all the answers

Which structure forms a lid over the glottis during swallowing?

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

Where is the trachea located in relation to the esophagus?

<p>Anterior to the esophagus (B)</p> Signup and view all the answers
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