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B1: Quiz 13
B1: Quiz 13
1) What are the 3 main characteristics that help to facilitate the efficient exchange of substances in animals/ humans? Explain why each of these characteristics are useful for exchanging substances.
2) The alveoli are where gas exchange takes place. The diagram below shows an alveolus with a capillary next to it.
2) The alveoli are where gas exchange takes place. The diagram below shows an alveolus with a capillary next to it.
a) Gases move between the alveoli and the bloodstream. What is the name for the process for how the gases move? Give a definition for this process as well.
b)
i) What gas moves from the alveoli into the bloodstream?
ii) What gas moves from the bloodstream into the alveoli?
c) Give 3 ways that the alveoli are adapted for the efficient exchange of gases. Explain how each of the adaptations helps the efficient exchange of gases.
3) Villi are responsible for the absorption of the soluble products of digestion into the bloodstream from the small intestine.
a) Quickly draw a few villi. Do not worry too much about your drawing.
b) Give 3 ways that the villi are adapted for the efficient absorption of the soluble products of digestion. You do not need to explain how the adaptations are useful for the efficient absorption of the soluble products of digestion.
c) The cells in the villi contain lots of mitochondria.
i) What is the role of mitochondria in cells?
ii) Why do cells in the villi contain lots of mitochondria?
b)
i) What gas moves from the alveoli into the bloodstream?
ii) What gas moves from the bloodstream into the alveoli?
c) Give 3 ways that the alveoli are adapted for the efficient exchange of gases. Explain how each of the adaptations helps the efficient exchange of gases.
3) Villi are responsible for the absorption of the soluble products of digestion into the bloodstream from the small intestine.
a) Quickly draw a few villi. Do not worry too much about your drawing.
b) Give 3 ways that the villi are adapted for the efficient absorption of the soluble products of digestion. You do not need to explain how the adaptations are useful for the efficient absorption of the soluble products of digestion.
c) The cells in the villi contain lots of mitochondria.
i) What is the role of mitochondria in cells?
ii) Why do cells in the villi contain lots of mitochondria?