Inhalation:
1. Diaphragm in a [blank_start]relaxed[blank_end] state is domed. When it contracts, it [blank_start]shortens[blank_end] and [blank_start]flattens[blank_end].
2. [blank_start]External[blank_end] intercostal muscles contract and pull on ribs - lifted up and out.
Respuesta
relaxed
shortens
flattens
External
Pregunta 2
Pregunta
After inhalation, the thoracic cavity will decrease in volume
Respuesta
True
False
Pregunta 3
Pregunta
As the the volume of the thoracic cavity increases, air pressure decreases.
Respuesta
True
False
Pregunta 4
Pregunta
If the thoracic cavity has a lower air pressure then...
Respuesta
air moves into the lungs down the pressure gradient
air moves out of the lungs down the pressure gradient
air moves into the lungs up the pressure gradient
air moves out of the lungs up the pressure gradient
Pregunta 5
Pregunta
Exhalation:
1. Diaphragm [blank_start]relaxes[blank_end] and rises.
2. The [blank_start]external[blank_end] intercostals relax and internal intercostals [blank_start]contract[blank_end].
3. The volume of the thoracic cavity [blank_start]decreases[blank_end].
Respuesta
relaxes
external
contract
decreases
Pregunta 6
Pregunta
As the volume of the thoracic cavity decreases, air pressure decreases.
Respuesta
True
False
Pregunta 7
Pregunta
As the air pressure in the thoracic cavity increases, air is forced out down the pressure gradient.