Pulmonary Volumes Quiz

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Questions and Answers

What triggers the early inflammatory response in bronchoconstriction upon exposure to allergens?

  • Release of inflammatory mediators (correct)
  • Presence of chemical fumes
  • High levels of fine airborne particles
  • Chronic exposure to air pollution

What occurs during the late inflammatory response in asthma?

  • Rapid resolution of airway narrowing
  • Decreased capillary permeability
  • Immediate bronchoconstriction
  • Increased airway hyperresponsiveness (correct)

What is a potential long-term consequence of chronic inflammation in asthma?

  • Enhanced cilia function
  • Decreased mucus production
  • Damage and hyperplasia of bronchial cells (correct)
  • Reduction in airway remodeling

What triggers bronchoconstriction as a protective response?

<p>Activation of receptors in airway mucosa (D)</p> Signup and view all the answers

What chronic condition may develop due to severe chronic asthma?

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

What is the role of the Myenteric plexus in the gastrointestinal tract?

<p>Regulates the overall muscle activity along the length of the gut (B)</p> Signup and view all the answers

Which neurotransmitter is primarily responsible for promoting gastrointestinal activity?

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

What effect does Norepinephrine have on gastrointestinal activity?

<p>Inhibits gastrointestinal activity (A)</p> Signup and view all the answers

Which of the following ganglia is NOT part of the sympathetic nervous system that innervates the gut?

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

What is the primary function of the Submucosal plexus?

<p>Helps manage local conditions like secretions and blood flow (B)</p> Signup and view all the answers

Which hormone is known to suppress appetite and slow gastric emptying?

<p>GLP-1 (C)</p> Signup and view all the answers

What spinal levels do the postganglionic fibers that innervate the gut originate from?

<p>T5 - L2 (C)</p> Signup and view all the answers

Which substance is NOT associated with facilitating the process of gastric emptying?

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

What is a key characteristic of bronchiectasis?

<p>Reduced gas exchange (B)</p> Signup and view all the answers

What can be a predisposing condition for the development of bronchiectasis?

<p>Severe pulmonary infections (A)</p> Signup and view all the answers

Which complication can occur as a result of bronchiectasis?

<p>Abscess formation (B)</p> Signup and view all the answers

What lifestyle factor increases the risk of developing tuberculosis (TB)?

<p>Living in crowded conditions (A)</p> Signup and view all the answers

What occurs after inhaled bacilli reach alveolar macrophages in TB infection?

<p>Multiplication of bacilli (C)</p> Signup and view all the answers

Which statement best describes latent tuberculosis (TB)?

<p>A dormant but living state of the bacteria (C)</p> Signup and view all the answers

What is a potential systemic consequence of untreated bronchiectasis?

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

Who among the following is at an increased risk for developing active TB?

<p>Older homeless individuals (B)</p> Signup and view all the answers

Which of the following factors is NOT a cause of the restrictive lung disease mentioned?

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

What is one of the main effects of lung injury in the pathophysiology of restrictive lung disease?

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

In cystic fibrosis, what is the inheritance pattern of the disorder?

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

Which of the following symptoms is commonly seen in the early stages of restrictive lung disease?

<p>Gradually increasing dyspnea on exertion (B)</p> Signup and view all the answers

What is a potential consequence of untreated restrictive lung disease?

<p>Development of pulmonary arterial hypertension (PAH) (C)</p> Signup and view all the answers

Which cell type is primarily injured at the start of the lung injury process in restrictive lung disease?

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

In cystic fibrosis, what is the main disruption caused by mutations in the CFTR gene?

<p>Disruption of sodium transport pathways (B)</p> Signup and view all the answers

Which of the following statements regarding cystic fibrosis is correct?

<p>It is equally expressed in males and females. (A)</p> Signup and view all the answers

What is the main function of pancreatic lipase?

<p>Hydrolysis of dietary fats (B)</p> Signup and view all the answers

What role do centeroacinar cells play in digestion?

<p>Neutralizing stomach acid (C)</p> Signup and view all the answers

How does bile improve fat digestion?

<p>By emulsifying large fat particles (C)</p> Signup and view all the answers

Which structure primarily secretes bile?

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

What is the main cause of gallstone formation?

<p>Excessive absorption of water and bile acids (A)</p> Signup and view all the answers

What triggers the gallbladder to empty bile?

<p>A fatty meal (C)</p> Signup and view all the answers

Which of the following statements about the small intestine is correct?

<p>It regulates digestion through inhibitory effects. (B)</p> Signup and view all the answers

What is the primary purpose of bile acids in the digestive process?

<p>To emulsify fats (D)</p> Signup and view all the answers

What is a common cause of acute peritonitis?

<p>Rupture of a hollow viscus (C)</p> Signup and view all the answers

What imaging finding is associated with bowel rupture?

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

Which condition is a structural cause of dysphagia?

<p>Zenker's diverticulum (A)</p> Signup and view all the answers

What is the resting tone of the lower esophageal sphincter (LES) in patients with GERD?

<p>It is lower than normal (D)</p> Signup and view all the answers

What is a potential consequence of repeated exposure of esophageal tissue to stomach acid?

<p>Development of Barrett's esophagus (D)</p> Signup and view all the answers

Which of the following is NOT a clinical manifestation of GERD?

<p>Severe abdominal pain (A)</p> Signup and view all the answers

Which treatment is generally considered first-line for addressing GERD symptoms?

<p>H2 blocker or PPI (C)</p> Signup and view all the answers

Which of the following is a cause of acute gastritis?

<p>Infection with Helicobacter pylori (D)</p> Signup and view all the answers

Flashcards

Specific Allergens

Substances that trigger allergic reactions, including cold air, fine airborne particles, air pollution, chemical fumes, GERD, and aspirin.

Bronchoconstriction

Narrowing of the airways in response to a trigger, reducing airway diameter to limit exposure.

Inflammatory Response (Asthma)

A key process in asthma where the airways become inflamed and swollen in response to triggers.

Early Phase Asthma Response

The initial response to an asthma trigger, appearing within 30 minutes and involving increased capillary permeability, edema, mucus production, and airway narrowing.

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Late Phase Asthma Response

The secondary response to an asthma trigger, occurring 4-8 hours after the early phase, marked by increased airway hyperresponsiveness, mediator release (especially from eosinophils), tissue damage, and airway remodeling.

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Airway Hyperresponsiveness

An increased sensitivity of the airways to triggers, leading to bronchoconstriction even with minimal exposure.

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Chronic Asthma Inflammation

Long-term inflammation causing damage and hyperplasia (growth) of bronchial cells and smooth muscle, leading to permanent structural changes.

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Frequent Asthma Attacks

Repeated exposures to triggering agents/events can trigger even more severe asthma attacks, over time.

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Cor Pulmonale

A condition resulting from severe chronic asthma, where the right side of the heart is damaged due to lung tissue damage.

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Bronchiectasis

A chronic lung disease characterized by permanent widening and damage of the airways, often due to infection.

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Predisposing conditions (bronchiectasis)

Conditions that increase the risk of developing bronchiectasis, including infections, aspiration, immune disorders, and obstructions.

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Symptoms of Bronchiectasis

Chronic airway obstruction, reduced gas exchange, inflammation, abscess formation, empyema, and potential secondary infections.

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Tuberculosis (TB)

An infectious disease caused by bacteria, primarily affecting the lungs.

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TB Risk Factors

Factors increasing the likelihood of contracting or developing active TB, such as close contact with an infected person, HIV, living conditions, and specific demographics.

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TB Pathophysiology

Inhaled TB bacteria multiply in lung tissue, initially triggering a local response. Weakened immunity can lead to active TB development.

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Latent TB

An infection where the bacteria are present but not actively causing disease.

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Fat Digestion

Pancreatic lipase, cholesterol esterase, and phospholipase break down fats.

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Centeroacinar Cells

Secrete bicarbonate to neutralize stomach acid in the duodenum.

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Bile's Role

Bile emulsifies fats into tiny droplets, thus increasing the surface area for lipase action.

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Bile Secretion

Occurs continuously from hepatocytes into bile canaliculi.

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Gallbladder Storage

Stores bile, concentrating it up to 5-20 times.

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Gallstone Formation

Caused by too much water absorption, bile acid or cholesterol in bile.

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Bile Release Trigger

Fatty foods in duodenum, triggering CCK release.

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Stomach Emptying Regulation

Duodenum inhibits stomach emptying via enterogastric reflexes.

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Sympathetic Nervous System Origin

Originates from abdominal prevertebral ganglia (celiac, superior mesenteric, and inferior mesenteric ganglia).

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Sympathetic Spinal Cord Segments

Postganglionic fibers emerge from spinal cord segments T5 to L2.

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Sympathetic Pathway to Gut

Sympathetic fibers travel through sympathetic chains to the gut.

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Enteric Nervous System

A mesh of neurons regulating GI tract function.

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Myenteric Plexus Function

Controls gut muscle activity (contractions).

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Submucosal Plexus Location

Located in the submucosa of the gut wall.

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Submucosal Plexus Function

Controls local conditions like secretions, transport.

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Acetylcholine's Role (GI)

Promotes GI activity, moving food through the gut.

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Norepinephrine/Epinephrine Effect (GI)

Inhibit GI activity, reducing blood flow.

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Gut Hormones and Gastric Emptying

Hormones like CCK, GIP, GLP-1, and PPY slow gastric emptying.

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Restrictive Lung Disease

A lung disease characterized by reduced lung expansion and decreased lung volume.

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Progressive Restrictive Lung Disease

A lung disease that gets worse over time, often with little relief. The lung is scarred and stiff.

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Loss of Cellular Regulation

Cells lose control over growth and activity; can cause uncontrolled inflammation and fibrosis.

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Alveolar Epithelial Cells

Cells lining the air sacs in the lungs.

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Fibrin Deposits

A protein that accumulates between lung tissues and walls, obstructing gas exchange.

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Profibrous Growth Factors

Stimulants that boost scar tissue formation.

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Interstitial Fibrosis

Thickening of lung tissue, leading to stiffness and decreased elasticity.

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Chronic Obstructive Pulmonary Disease (COPD)

A progressive lung disease characterized by airflow obstruction and chronic inflammation.

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CFTR Gene

A gene responsible for producing a protein that regulates salt and water transport across cell membranes, primarily in lungs.

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Autosomal Recessive Transmission

A genetic pattern where a child needs two copies of a faulty gene—one from each parent—to inherit the disorder.

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Compound Heterozygous

Present with two different mutated forms of a gene.

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Cystic Fibrosis (CF)

A genetic disease affecting the exocrine glands, such as those in the lungs and digestive system.

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Acute Peritonitis Cause

Rupture of a hollow abdominal organ; often a complication of inflammatory bowel disease or malignancy.

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Bowel Rupture Effect

Bowel contents irritate the peritoneum, potentially causing air (pneumoperitoneum) to be visible on imaging.

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Pneumoperitoneum Imaging

Air in the peritoneal cavity. Indicates a possible perforation of a hollow organ such as the bowel.

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Vascular Cause of Abdominal Pain

Mesenteric ischemia or ruptured abdominal aortic aneurysm.

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Obstetric/Gynecological Cause

Ruptured ectopic pregnancy or ovarian torsion.

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Urological Cause

Ureteral colic or pyelonephritis (kidney infection).

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Dysphagia

Difficulty swallowing.

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Oropharyngeal Dysphagia

Difficulty moving food from mouth to esophagus, often causing coughing.

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Esophageal Dysphagia Presentation

Food not going down, sensation of something stuck, or globus sensation.

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GERD (Gastroesophageal Reflux Disease)

Stomach contents refluxing into the esophagus, causing irritation.

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GERD Etiology

Abnormal function of the lower esophageal sphincter (LES), esophageal motility, gastric motility or emptying.

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GERD Exacerbating Factors

Increased abdominal pressure (e.g., vomiting, coughing, lifting, obesity, pregnancy) can worsen GERD.

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GERD Tissue Damage

Stomach acid exposure damages the esophageal lining, leading to pro-inflammatory cells and cytokines.

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GERD Potential Complications

Can lead to asthma, chronic cough, laryngitis, esophageal cancer (Barret's esophagus).

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Acute Gastritis

Inflammation of the stomach lining.

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Study Notes

Pulmonary Volumes

  • Tidal Volume (TV): Volume of air inhaled and exhaled in a normal breath. Approximately 500 mL.
  • Minute Volume: Volume of air inhaled and exhaled in one minute. Calculated by multiplying TV by respiratory rate. Approximately 8 L.
  • Alveolar Volume: Tidal volume minus dead space volume. Approximately 350 mL (500 mL – 150 mL).
  • Inspiratory Reserve Volume (IRV): Extra volume of air that can be inhaled beyond the normal tidal volume. Approximately 3,000 mL.
  • Expiratory Reserve Volume (ERV): Volume of air that can be forcefully exhaled after a normal tidal inhalation. Approximately 1,100 mL.
  • Residual Volume (RV): Volume of air remaining in the lungs after the most forceful exhalation. Approximately 1,200 mL.
  • Forced Expiratory Flow (FEF) or Peak Expiratory Flow (PEF/PEFR): Flow rate of exhaled air during a forced exhalation.
  • Forced Expiratory Volume 1 (FEV1): Maximum amount of air that can be forcefully exhaled in the first second of exhalation following maximal inhalation. A normal value is 80% of a person's normal average.
  • Diffusing Capacity of Lung Carbon Monoxide (DLCO): Measurement of the ability of gases to move from the alveoli into the blood.

Pulmonary Capacities

  • Inspiratory Capacity (IC): Composed of tidal volume and inspiratory reserve volume. Approximately 3,500 mL.
  • Functional Residual Capacity (FRC): Composed of expiratory reserve volume and residual volume. Approximately 2,300 mL.
  • Vital Capacity (VC): Composed of Inspiratory Reserve Volume + Tidal Volume + Expiratory Reserve Volume. Approximately 4,600 mL.
  • Total Lung Capacity (TLC): Composed of tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Approximately 6 L.
  • Forced Vital Capacity (FVC): Maximum amount of air that can be exhaled as quickly as possible after a maximal inhalation. Indicates respiratory muscle strength and ventilatory reserve. Average values for men and women are given.

Pulmonary Functions

  • Regulation of oxygenation and gas exchange.
  • Protection (e.g., macrophages, surfactant).
  • Maintenance of cardiac output and blood pressure.
  • Immunity.
  • Fluid, electrolyte, and acid-base balance.

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