Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

8 Cards in this Set

  • Front
  • Back

why does air flow into the lungs

because of the gas pressure gradients

what causes gas pressure gradients

caused by a pump ( the thoracic cavity muscles)

Boyles law states:


pressure multiplied by volume equals the constant

pressure is caused by gas particles hitting container walls so

larger the volume the lower the pressure

how air enters the lungs

lung pressure < atmospheric pressure

lung volume increases for inspiration

For air to leave the lungs ...

lung pressure > atmospheric pressure

lung volume decreases for expiration

muscles used for ventilation

thoracic cavity (cage)

ribs, spine and sternum from top and sides

the diaphragm

what happens for quiet expiration

passive muscle relaxation

forced expiration

internal intercostal contracts.