I Fucking Love Biology--Gas Exchange and Circulation

Question 1 of 9

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Why is it more difficult to breathe at higher elevations?

Select one of the following:

  • The partial pressure of oxygen is higher at higher elevations; therefore the partial pressure gradient is higher and oxygen moves more quickly into the body.

  • The partial pressure of oxygen is lower at higher elevations; therefore less oxygen moves into the body down its partial pressure gradient.

  • The lower partial pressure of oxygen makes it more difficult for alveoli to inflate, making it harder for the body to receive oxygen from air inhaled.

  • The partial pressure of oxygen is lower at higher elevations, meaning there is less oxygen physically available to consume.

Question 2 of 9

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Bergmann's rule states that at _______________ elevations, body shapes tend to be _________________.

Select one of the following:

  • higher, larger

  • higher, smaller

  • lower, larger

  • lower, smaller

Question 3 of 9

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what the fuck is a surfactant? what does this have to do with the mammalian respiratory system?

Select one of the following:

  • a surfactant is a fluid that lowers the surface tension that is found in the alveoli. this helps mammalian respiratory system by decreasing the amount of pressure needed to inflate alveoli after deflation.

  • a surfactant is a fluid that is found inside the lining of the lungs. This helps the respiratory system by increasing the amount of oxygen that is pushed into the alveoli.

  • a surfactant is a a thin layer of molecules that sits inside the alveoli. This helps the respiratory system by decreasing the amount of pressure needed to deflate the alveoli after inflation.

  • a surfactant is a fluid that binds to incoming oxygen inside the alveoli. this helps the respiratory system by working along a partial pressure gradient and increasing the pressure to help inflate the alveoli.

Question 4 of 9

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in which body of water would you expect to have the highest level of oxygenation?

Select one of the following:

  • a lake that is at an elevation 3,000 feet above sea level.

  • a large, shallow pond that is stagnant.

  • a shallow, small river that has a rapid current with lots of rocks.

  • a large river that is deep that empties out into the ocean.

Question 5 of 9

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fish are known to use up to 20% of the energy in order to breathe in their aquatic environment. Which fish would have the greatest difficulty in breathing due to environmental constraints?

Select one of the following:

  • a smaller fish that lives in a shallow, freshwater pond.

  • a saltwater fish that lives in a tropical ocean reef.

  • a freshwater fish that lives in a very warm river.

  • a larger fish that lives in a cool lake with many mineral deposits.

Question 6 of 9

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What would you expect natural selection to act upon in Fick's law?

Select one of the following:

  • A. the difference in partial pressure of gas on either side of diffusion barrier

  • B. the amount of surface area available for gas exchange

  • C. the thickness of the diffusion barrier

  • both A and B

  • both B and C

  • D. the solubility of gas medium

  • all of the above

Question 7 of 9

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an amphibian uses a _____________ to create ______________ pressure to inflate lungs. A human uses _____________ to create _______________ pressure in order to breathe.

Select one of the following:

  • oral opening, positive, alveoli, negative

  • oral opening, negative, alveoli, positive

  • buccal pump, negative, diaphragm, positive

  • buccal pump, positive, diaphragm, negative

Question 8 of 9

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If an underweight, full term, freshly minted baby has a hard time making its first breath, what might you assume to be true of its respiratory system?

Select one of the following:

  • lungs are underdeveloped in baby and the bronchioles are too small in order to allow the necessary ratio of air into the lungs in order to breathe properly.

  • surfactant development was somehow stunted during pregnancy and the pressure needed to inflate the alveoli is much higher than baby can deal with.

  • baby doesn't have enough body weight to properly expel the first breath of oxygen to fight the partial pressure gradient of oxygen and carbon dioxide.

  • baby is underweight and probably had poor nutrition during its pregnancy, which would affect its ability to breathe properly.

Question 9 of 9

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why is a bird lung so damn efficient?

Select one of the following:

  • A. one way air flow allows more air to come into the lung and allows the bird to extract more oxygen

  • B. less dead space between the anterior air sacs and the mouth allow birds to use air obtained much more efficiently

  • C. gas exchange occurs during inhalation and exhalation.

  • D. air flowing through four different chambers allows the bird to maximize exhalation of carbon dioxide, allowing more oxygen to move into the lungs.

  • both A and C

  • both B and C

  • all of the above

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I Fucking Love Biology--Gas Exchange and Circulation

erika.roloff
Quiz by , created over 1 year ago

this is a test quiz to see how this works

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erika.roloff
Created by erika.roloff over 1 year ago
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