Biology Quiz on Respiration and Gas Exchange

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Questions and Answers

What is the primary function of gills in fish?

  • To store nutrients transported in the blood
  • To absorb carbon dioxide from the water
  • To increase surface area for gas exchange (correct)
  • To regulate water flow over the body

Which structure in plants primarily controls the gas exchange process?

  • Chloroplasts
  • Guard cells
  • Epidermal cells
  • Stomata (correct)

During respiration, what do plants primarily produce as a byproduct?

  • Water vapor
  • Carbon dioxide (correct)
  • Oxygen
  • Glucose

How long can a hippopotamus hold its breath while submerged?

<p>Five minutes (D)</p> Signup and view all the answers

What role do guard cells play in plant respiration?

<p>They regulate the opening and closing of stomata (D)</p> Signup and view all the answers

What does the milky appearance in limewater demonstrate during respiration experiments?

<p>Carbon dioxide release during exhalation (C)</p> Signup and view all the answers

Which method do flatworms primarily use for gas exchange?

<p>Outer surfaces (D)</p> Signup and view all the answers

Which of the following correctly describes the path of carbon dioxide during the respiration process?

<p>Moves from tissues to lungs and out of the body (A)</p> Signup and view all the answers

What benefit do terrestrial animals gain from more efficient lungs?

<p>Enhanced oxygen absorption (A)</p> Signup and view all the answers

What is the primary function of spiracles in insects?

<p>Allow gas exchange through tracheae (C)</p> Signup and view all the answers

How do amphibians like frogs differ in carbon dioxide expulsion compared to lungs?

<p>They expel it 2.5 times faster through skin than through lungs (D)</p> Signup and view all the answers

What percentage of carbon dioxide do humans exhale through their skin?

<p>1% (B)</p> Signup and view all the answers

What evolutionary significance do lungs have in terrestrial animals?

<p>Allow for higher metabolic rates (C)</p> Signup and view all the answers

Flashcards

Respiration in flatworms

Flatworms exchange gases through their outer surfaces.

Earthworm respiration

Earthworms use capillaries for gas exchange throughout their body.

Unicellular gas exchange

Unicellular organisms (like Amoeba & Paramecium) use their cell membranes to exchange gases.

Amphibian skin respiration

Amphibians utilize their skin for gas exchange, up to 60% in some species

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Respiratory surfaces

Internal surfaces dedicated to gas exchange, connected to the outside.

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Tracheae

Network of tubes in some animals that carry air to body cells.

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Lung evolution

Lungs likely evolved about 400 million years ago.

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Water loss & lungs

Terrestrial animals need more efficient lungs due to water loss.

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Fish breathing

Fish use gills to breathe oxygen dissolved in water. The gills increase surface area for gas exchange and absorb oxygen while releasing carbon dioxide.

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Plant respiration

Plants take in oxygen and release carbon dioxide through small pores called stomata in their leaves. This process breaks down glucose into carbon dioxide and water.

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Stomata

Tiny pores on plant leaves that allow for gas exchange, taking in oxygen and releasing carbon dioxide.

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What do plants release during respiration?

Plants release carbon dioxide as a byproduct of respiration, along with water.

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What is the function of gills?

Gills are the respiratory organs of fish. They increase the surface area for gas exchange, absorbing oxygen from water and releasing carbon dioxide.

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