bios 224 GI exam - –Answer - scalenes diaphragm external interco...

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bios 224 GI exam

• The muscles of inspiration include the . Select all that apply.

–Answer - scalenes diaphragm external intercostals pectoralis minor

• Match the muscles with the correct role in ventilation.

–Answer External intercostals = Inhalation Internal intercostals = Exhalation

• Indicate the events that occur with inspiration.

–Answer Diaphragm contracts; thoracic cavity expands; intra-alveolar pressure drops; air flows into lungs

• Ventilation can be defined as the .

–Answer movement of air into and out of the lungs

• Correctly place the order of events that occur during quiet expiration.

–Answer

• Inspiratory muscles relax.
• Volume of thoracic cavity decreases.
• Increase in intra-alveolar pressure.
• Air flows out of lungs.
• The diaphragm, external intercostals, pectoralis minor, and scalenes are muscles of .

–Answer inspiration 1 / 3

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• When considering the inspiration/expiration cycle that occurs with pul- monary

ventilation, the internal intercostal muscles have a role in the process of while external intercostals are important in the process of .–Answer expiration, inspiration

• Indicate the order of events that occur with inspiration.

–Answer

• Diaphragm and external intercostals contract.
• Volume of thoracic cavity increases and pressure decreases.
• Air flows into lungs and alveoli.
• The muscles of expiration include . Select all that apply.

–Answer internal intercostals abdominal muscles transverse thoracis

• Indicate the order of events that occur during quiet expiration.

–Answer Respiratory muscles relax; volume of thoracic cavity decreases; intra-alveolar pressure increas- es; air flows out of lungs

• Contraction of the muscles of causes an increase in the volume of the

thoracic cavity.–Answer inspiration

• When muscles of inspiration contract, the volume of the thoracic cavity

.–Answer increases

• As the volume of a closed container decreases, the pressure of the gas within it increases. 2 / 3

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This is an example of which gas law?–Answer Boyle's Law Boyle's law explains that the pressure of a volume of gas is inversely proportional to its volume.

• During quiet breathing, is passive.

–Answer expiration

• Abdominal muscles are active during .

–Answer labored expiration

• In a chamber such as the thoracic cavity, pressure will decrease as the volume .

–Answer increases

• Of the three gas laws, law refers to the relationship between volume and pressure, law

discusses why oxygen moves according to its own partial pressure gradient, and law describes why more carbon dioxide is dissolved in plasma than oxygen.–Answer Boyle's, Dalton's, Henry's

• Boyle's law covers the principle that .

–Answer as volume increases, pressure decreases

• Consider the relationship between air flow, pressure, and resistance. As the pressure

gradient increases, air flow .–Answer increases

• During quiet breathing, inspiration is ..

–Answer active

• True or false
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