KA2.7 - Absorption of Materials Flashcards

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1
Q

Oxygen from the air and nutrients from food must be absorbed into the bloodstream for cells to do …

A

Respiration.

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2
Q

Waste materials, such as … must be removed from cells into the bloodstream.

A

Carbon dioxide.

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3
Q

What are the features found in surfaces that absorb materials?

A
  • Large surface area.
  • Thin walls.
  • Extensive blood supply.
  • These all increase the efficiency of absorption.
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4
Q

The purpose of the lungs is to exchange …

A

Gas. The purpose of the lungs is to exchange gas, e.g. oxygen and carbon dioxide.

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5
Q

Name the structure that keeps airways open?

A

Rings of cartilage.

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6
Q

What is the site of gas exchange in the lungs?

A

Alveoli.

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7
Q

What features make the alveoli good at gas exchange?

A
  • Large surface area due to high number.
  • Thin walls.
  • Extensive blood supply.
  • Moist surface (allows gases to exchange easier).
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8
Q

The … in the small intestine absorb nutrients from food into the blood.

A

Villi.

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9
Q

Describe the structure of the villi (picture the diagram in your head and label it)?

A

A villi has a lacteal and capillaries and looks like a thick hair.

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10
Q

In the villi the blood capillary absorbs … and … , and the lacteal absorbs … and …

A

glucose and amino acids … fatty acids and glycerol.

In the villi the blood capillary absorbs glucose and amino acids, and the lacteal absorbs fatty acids and glycerol.

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