Inspiration+Expiration+JO

1. Define inspiration, expiration Inspiration**: a.k.a. inhalation, moves air into lungs
 * Mechanism of Breathing pp. 174-176
 * Expiration**: a.k.a. exhalation, moves air out of the lungs

The intercostal muscles are located on the outer side of the lungs, takes up space between lungs and ribcage.
 * 2. Where are the intercostal muscles?**

It is located below the lungs… its like a plate below the lungs
 * 3. Where is the diaphragm muscle?**


 * 4. The lungs are in a "sealed" off thoracic cavity. Describe this cavity. Why is it considered "sealed"?**

During inspiration the intercostal muscles contract causing the diaphragm to flatten into a sheet. The rib cage itself moves upwards and outwards.
 * 5. Describe the diaphragm and intecostal muscles during inspiration.**

It is negative pressure. When more room is created something needs to take up the extra space, air takes up that extra space. Example: bellows
 * 6. Air does NOT force open the lungs. So why does air enter the lungs?**

The passive means no effort is required to exhale. It happens when the lungs recoil.
 * 7. Passive Recoil occurs during expiration. What does that mean?**

When the lungs recoil the elastic qualities are at work…
 * 8. Why is air pushed out during expiration?**

By the muscles in your back, chest and neck expanding the room allowed for your lungs to expand.
 * 9. How can you achieve maximum inspiratory effort?**

You can contract the internal intercostal muscles which forced the ribcage inward, making the space for the lungs smaller.
 * 10. How can you force expiration which is usually passive?**

It is only the tidal volume, about 500 mL, can be compared to the ocean tides.
 * 11. Do you use your total lung capacity when you breathe? What do you use?**

dead air space is that left over in the nasal, bronchial areas. Air fills them when filling the lungs.
 * 12. Why are the nasal cavities, trachea, bronchii, and bronchioles considered "dead air space"?**

Breathe deeply and slowly, it is so new air can reach the lungs past the residual air and the dead air space.
 * 13. How should you breathe to get the most fresh air to your alveoli? Why?**