Gas Exchange Flashcards

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1
Q

What are exchanges surfaces? Give 3 examples.

A

Exchange surfaces increase the absorption of nutrients into an organism

Roots in plants (water)

Small intestines (glucose, amino acids, fatty acids, glycerol)

Lungs (oxygen)

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2
Q

What are the organs of the respiratory system?

A

Trachea,Alveoli,Lung,Bronchi,Bronchiole

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3
Q

What is the function of the lungs?

A

To take oxygen from the air and transfer it into the bloodstream

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4
Q

Explain how the lungs are adapted for their function.

A

Alveoli make large surface area so there is more membrane for diffusion to happen across

Good blood supply to maintain high concentration gradient

Walls one cell thick to provide short diffusion pathway

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5
Q

What is the function of a leaf?

A

Photosynthesis

Take in carbon dioxide for photosynthesis

Take in oxygen for respiration

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6
Q

How do oxygen and carbon dioxide enter the leaf?

A

Through the stomata

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7
Q

Compare inhaled air differ and exhaled air.

A

Inhaled air has more oxygen

Exhaled air has more carbon dioxide

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8
Q

In what direction does oxygen move during gas exchange?

A

From the alveoli to the blood

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9
Q

In what direction does carbon dioxide move during gas exchange in the lungs?

A

From the blood to the alveoli

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10
Q

How do oxygen and carbon dioxide move during gas exchange in the lungs?

A

By diffusion

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11
Q

What is diffusion?

A

Spreading out of particles from a higher concentration to a lower concentration

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