LQB185 Lecture Notes - Lecture 5: Simple Squamous Epithelium, Bronchus, Smooth Muscle Tissue
25 May 2018
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Week 5 Lecture- Respiratory System
➢ Focus
- Transfer of O2 for inhaled air in blood
- Transfer of CO2 from blood to exhaled air
- Acid-base balance
-respiratory system helps with short term regulation of acid-base
balance in the blood, pH in blood for maintaining functionality of
protein in blood.
➢ Carbon Dioxide super important for regulation our body function and
health
➢ Myo: muscle
➢ Lytics: rupture
➢ Hyaline Cartilage
- C-shaped rings through trachea to allow swallowing large items
- Full rings once split into bronchus
➢ Smooth muscle
- All the way down until alveoli
- Tubes (sheet) -> strips wound around when getting smaller
➢ Epithelium
- Moves from column to simple squamous
- Columnar in upper section because of mucous -> get stuff out, cilia as
well.
- Cilia in Upper -> sweep down
- Cilia in Lower -> sweep up
- No mucous in small airways -> blocks airways, only surfactant
secretion (slimy)
➢ Macrophage (dust cell)
- Consume any foreign material
➢ Type I and II alveolar cells
- Epithelium cells
- Simple squamous
- Type II secretes surfactant fluid
➢ Elastic fibres used to expand in alveoli
➢ Acid-base balance uses several buffering systems
➢ Our measure of pH is our H+ (hydrogen) concentration
➢ Can’t measure H+ ions easily, can measure partial pressures of gases,
carbon dioxide, oxygen saturation and bicarbonate ion
find more resources at oneclass.com
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Document Summary
Transfer of o2 for inhaled air in blood. Transfer of co2 from blood to exhaled air. Respiratory system helps with short term regulation of acid-base balance in the blood, ph in blood for maintaining functionality of protein in blood. Carbon dioxide super important for regulation our body function and health. C-shaped rings through trachea to allow swallowing large items. Tubes (sheet) -> strips wound around when getting smaller. Columnar in upper section because of mucous -> get stuff out, cilia as well. No mucous in small airways -> blocks airways, only surfactant secretion (slimy) Elastic fibres used to expand in alveoli. Our measure of ph is our h+ (hydrogen) concentration. Can"t measure h+ ions easily, can measure partial pressures of gases, carbon dioxide, oxygen saturation and bicarbonate ion. Change ph of blood -> increase rate of breathing = offloading more carbon dioxide. Carbonate dioxide is in the equation thus it is somehow related to the level of ph.
