Hi chegg please help . Thank you for taking the time to read everything in detai

Question

Hi chegg please help . Thank you for taking the time to read everything in detail I appreciate it very much.
Anatomy respiratory system
My instructor used the bell jar method
3 questions in total here .
For question #1 I noticed that when he applied upward pressure to the diaphragm the balloons which represent ( lungs) DEFLATED.

For Question # 2
The release of the diaphragm caused the balloons to INFLATE
questions # 3 I observed the balloons Deflate.

Procedure 1 Model Ventilation with the Bell-Jar Model In this procedure we will use a bell-jar model of the lungs, shown in Figure 13.7, to view the effects of pressure and volume on ventilation. The bell-jar model has two balloons, each representing one lung, and a flexible membrane on the bottom that represents the diaphragm. 1 Apply upward pressure to the diaphragm. This represents how the diaphragm looks when it is relaxed. What has happened to the pressure of the system (has it increased or decreased)? What happened to the volume of the lungs? Now slowly release the diaphragm. This represents the diaphragm flattening out as it contracts. What is happening to the pressure as you release the diaphragm? What happened to the volume of the lungs? 2 FIGURE 13.7 Bel-jar model of the lungs, simulated inspiration 3 If your bell-jar model has a rubber stopper in the top, you can use it to demonstrate the effcts of a pneumotchorax allows air to enter the pleural cavity, With the diaphragm flat and the lungs (balloons)inflated,loosen the rubber stopper.What happens to the lungs? Why? (noo-muh-THOHR-ax) on lung tissue. A pneumothorax generally is caused by a tear in the pleural membranes that

Explanation / Answer

1)When an upward pressure is applied on diaphragm the diaphragm will be in relaxed state and balloons will deflate this because the increased upward prssure will forced lungs to gases outside this is beause as pressure increases volume decreases forcing the gases present in ballons to exhale by which balllon(lungs) volume also decreases .As upward pressure increases the volume of diaphragm increases and volume of lungs decreases.

2) When diaphragm is released the pressure inside diaphragm is lowered leading to contraction of diaphragm this contraction helps lungs to expand enabling more amount air to come in.The pressure inside lungs is decreased leading to increased volume by which more amount of air can be inhaled.

3) Pneumothorax is condition in which gases escape to pleural cavity based on above condition if during inflation of lungs gases escapes to pleural cavity then most of oxygen will not be available to lungs a condition of lower blood pressure can be seen with one side chest pain as pressure in diaphragm increases.

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