Pulmonary surfactant Flashcards

1
Q

What is surfactant?

A

mixture of phospholipids, carbohydrates and proteins

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2
Q

What cells secrete surfactant

A

type 2 pneumocytes.

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3
Q

What is the main functioning component of surfactant and what is its role?

A

dipalmitoyl phosphatidylcholine (DPPC)
=> reduces alveolar surface tension

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4
Q

As alveoli decrease in size, surfactant concentration is increased. TRUE/FALSE?

A

TRUE => helping prevent the alveoli from collapsing

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5
Q

Surfactant reduces the muscular force needed to expand the lungs (i.e. decreases the work of breathing). TRUE/FALSE?

A

TRUE

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6
Q

How does surfactant prevent the alveoli from collapsing at the end of each expiration?

A

lowers the elastic recoil at low lung volumes

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7
Q
A
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