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Respiratory~System
Bio 212 Exam 3
| Question | Answer |
|---|---|
| What is the respiratory system? | It is known for gas exchange which occurs between the air in the lungs and the blood AND between the blood and tissues. |
| What is ventilation? | Ventilation is the movement of air into and out of the lungs. |
| What are the structures of the respiratory system? | The nasal cavity, the pharynx, the larynx, the trachea, the bronchial tree, and the lungs. |
| What are the three regions of the pharynx? | 1) Nasopharynx 2) Oropharynx 3) Laryngopharynx |
| What does the nasal cavity help with? | It increases surface area and turbulence and humidifies and warms the air before it enters into the pharynx. |
| What is the larynx? | It is formed by multiple paired (arytenoids, corniculate, cuneiform) and unpaired (thyroid, cricoid, epiglottis) cartilages. The true vocal cords are found here. |
| What is the respiratory zone? | This is where gas exchange occurs. |
| What is Boyle's Law? | It states that gas pressure is inversely related to volume. P=k/V Therefore, if size of alveoli increases it decreases in pressure. Air moves from high to low pressure. |
| What is Dalton's Law? | It states that the partial pressure of a gas is equal to its contribution to the total pressure of a mixture of gases. |
| What is Henry's :aw? | It states that the concentration of a dissolved gas is determined by its pressure ans solubility coefficient. |
| What does an oxygen-hemoglobin saturation curve demonstrate? | The affinity hemoglobin has for oxygen at specific pressures or saturation. Changes in the environment affect this curve. EX) Decrease of pH causes curve to shift right. |
| When the curve in the oxygen-hemoglobin saturation curve is curved Left or Right, what does it mean? | Right=Release of O2. Occurs in tissues where O2 is needed. pH, increase in pp of CO2/temp causes this shift. Left=Lungs; due to opposing factors. |