Respiratory System - Part Two

A surfactant is a (a)  

• Substance that increases surface tension 
• Substance that reduces surface tension
• Substance that hardens surface area
• Substance that lines the trachea

Surface tension is the force that causes a liquid's surface to (a)   .

• Contract
• Expand
• Evaporate
• Solidify

High surface tension in the lungs can lead to (a)   collapse.

The external intercostals are located (a)   the ribs.

• Between
• Above
• Below
• Inside

Sternocleidomastoid and (a)   ​muscles assist during forceful inspiration by lifting the sternum and upper ribs?

• Scalene
• Trapezius
• Subclavius
• Anterior deltoid

The​ (a)   muscles depress the rib cage, decreasing thoracic

volume.

• Internal intercostal
• External intercostal
• Innermost intercostal
• Serratus posterior superior

During quiet breathing, expiration is primarily (a)   , relying on the elastic recoil of the lungs and thoracic cage.

• Passive
• Active
• Resisted
• Voluntary

What is the primary muscle of inspiration?

(a)  

What is Tidal Volume (TV)?

• The volume of air inhaled or exhaled during normal, quiet breathing.

• The total volume of air the lungs can hold after maximum inhalation.

• The volume of air remaining in the lungs after a normal exhalation.

• The maximum volume of air that can be exhaled after a maximum inhalation.

What is Minute Volume?

• The total volume of air inhaled or exhaled per minute.

• The amount of blood pumped by the heart per minute.

• The volume of air in the lungs after a maximal inhalation.

• The amount of oxygen consumed by the body per minute.