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IB Biology: B3.1-Adaptations of the Lungs for Gas Exchange

IB Biology: B3.1-Adaptations of the Lungs for Gas Exchange

Assessment

Flashcard

Biology

9th - 12th Grade

Hard

Created by

Herbert Asiedu-Mante

FREE Resource

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8 questions

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1.

FLASHCARD QUESTION

Front

What are alveoli?

Back

Microscopic spheres in the lungs that increase surface area for gas exchange.

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2.

FLASHCARD QUESTION

Front

Why do alveoli have a thin epithelial layer?

Back

To minimize diffusion distances for respiratory gases.

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3.

FLASHCARD QUESTION

Front

What surrounds the alveoli to aid in gas exchange?

Back

A rich capillary network.

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4.

FLASHCARD QUESTION

Front

Why are alveoli roughly spherical in shape?

Back

To maximize the available surface area for gas exchange.

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5.

FLASHCARD QUESTION

Front

What covers the internal surface of the alveoli?

Back

A thin layer of phospholipid and protein called surfactant.

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6.

FLASHCARD QUESTION

Front

What is the function of surfactant in the alveoli?

Back

Reduces surface tension and prevents alveolus from collapsing during breathing.

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7.

FLASHCARD QUESTION

Front

Which cells secrete surfactant?

Back

Type II pneumocytes.

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