Lab Day 1. Describe intrapleural pressure and indicate why it needs to be negati
ID: 3479892 • Letter: L
Question
Lab Day 1. Describe intrapleural pressure and indicate why it needs to be negative: 2. Define each of the three gas laws associated with the respiratory system Boyle's law- Dalton's law- Henry's law- 3. Identify the following for the process of eupnea (normal ventilation) and hyperpnea (active ventilation) Ventilation Normal inhale Normal exhale Active inhale Active exhale Respiratory center involved or turned on (include DRG and specific VRG) Muscles involved (list all which contract in response) Volume changes (indicate increase or decrease) Pressure changes (indicate increase of decrease) Movement of air (indicate drawn in or forced out of alveoli)Explanation / Answer
1. Intrapleural pressure: Intrapleural pressure is the pressure existing in the pleural cavity i.e. in between the visceral and parietal layers of pleura. It is exerted by the suction of the fluid that lines the pleural cavity.
Reason for negative pleural pressure: The pleural cavity is always lined by a thin layer of fluid that is secreted by the visceral layer of pleura. This fluid is constantly pumped from the pleural cavity into the lymphatic vessels. Pumping of fluid creates the negative pressure in the pleural cavity.
2. Gas laws associated with the respiratory system:
Boyle's law: In a closed system, the pressure of the gas is inversely proportional to its volume (provided the temperature of the system is constant).
Dalton's law: The total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases in that mixture. This dictates that the relative concentration of gases remains the same, both inside and outside the body.
Henry's Law: In chemistry, Henry's law states that the amount of dissolved gas is proportional to its partial pressure in the gas phase. For respiratory system, this law gives us the amount of oxygen that dissolves into the bloodstream is directly proportional to the partial pressure of oxygen in the alveolar air.
3.
Ventilation Normal Inhale Normal Exhale Active Inhale Active Exhale Respiratory center turned on (include DRG and specific VRG) DRG Specific VRG DRG, Pneumotaxic center; Apneustic center VRG Muscles involved (list all which contract in response) Diaphragm, External intercostal muscles Diaphragm, Internal intercostal muscles Diaphragm, External intercostal muscles, Sternocleidomastoid, scalene, anterior serrati, elevators of scapulae and pectorals Diaphragm, Internal intercostal muscles, Abdominal muscles Volume changes (indicate increase or decrease) Increase Decrease Increase Decrease Pressure changes (indicate increase or decrease) Decrease Increase Decrease Increase Movement of air (indicate drawn in or forced out of alveoli) Drawn in Forced out of alveoli Drawn in Forced out of alveoliRelated Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.