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Materia: Biology Senior 3
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Maintenance of the organisms
TERCER TRIMESTRE
Fecha de presentación: Tuesday December 10th

A- Transport in humans
1) Fig 1 shows a section through the heart

(a) Label parts A, B, C and D
(b) Shade the cavity of the ventricle which contains oxygenated blood.
(c) Outline the function of structure A
(d) Suggest why the wall around chamber C is much thick than that around chamber D
2) The coronary arteries supply blood to the heart muscle.
a- Suggest two activities of humans which might cause a clot in the coronary artery.
1 ……………………………………………………………………………………………………………………..
2 …………………………………………………………………………………………………………………

b- Explain what might be the result of such a blockage.
……………………………………………………………………………………………………………………..
……………………………………………………………………………………………………………………………..
……………………………………………………………………………………………………………………………….

B- Respiration
1) a- If, in one word, you had to say what respiration was about, which word would you choose from this list:
Breathing- energy- oxygen- cells- food?
b- In which parts of a living organism does respiration take place?

2) a- What are the main differences between aerobic and anaerobic respiration?
b- What is the difference between aerobic and anaerobic respiration in the amount of energy released from one
molecule of glucose?
3) What are the products of a) anaerobic respiration in yeast?
b) anaerobic respiration in muscles?
4) Why do you think your breathing rate and heart rate stay high for some time after completing a spell of vigorous
exercise?
C- Gas exchange

1) Label parts A, B and C.
2) Place the following structures in the order in which air reach them when breathing in: bronchus, trachea, nasal cavity,
alveolus.
3) One function of the small intestine is to absorb food. One function of the lungs is to absorb oxygen. Point out the basic
similarities in these two structures which help to speed the process of absorption.
4) Place the following in the correct order: lungs expand, ribs rise, air enters lungs, external intercostals muscles contract,
thorax expands.
5) Describe the path taken by a molecule of oxygen from the time it is breathed in through the nose, to the time it enters
the heart in some oxygenated blood.

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Biology s3, 3rd. term quest dec 2013

  • 1. Materia: Biology Senior 3 Profesora: Ma. Magdalena Ravagnan Contenido nodal: Maintenance of the organisms TERCER TRIMESTRE Fecha de presentación: Tuesday December 10th A- Transport in humans 1) Fig 1 shows a section through the heart (a) Label parts A, B, C and D (b) Shade the cavity of the ventricle which contains oxygenated blood. (c) Outline the function of structure A (d) Suggest why the wall around chamber C is much thick than that around chamber D
  • 2. 2) The coronary arteries supply blood to the heart muscle. a- Suggest two activities of humans which might cause a clot in the coronary artery. 1 …………………………………………………………………………………………………………………….. 2 ………………………………………………………………………………………………………………… b- Explain what might be the result of such a blockage. …………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………. B- Respiration 1) a- If, in one word, you had to say what respiration was about, which word would you choose from this list: Breathing- energy- oxygen- cells- food? b- In which parts of a living organism does respiration take place? 2) a- What are the main differences between aerobic and anaerobic respiration? b- What is the difference between aerobic and anaerobic respiration in the amount of energy released from one molecule of glucose? 3) What are the products of a) anaerobic respiration in yeast? b) anaerobic respiration in muscles? 4) Why do you think your breathing rate and heart rate stay high for some time after completing a spell of vigorous exercise?
  • 3. C- Gas exchange 1) Label parts A, B and C. 2) Place the following structures in the order in which air reach them when breathing in: bronchus, trachea, nasal cavity, alveolus. 3) One function of the small intestine is to absorb food. One function of the lungs is to absorb oxygen. Point out the basic similarities in these two structures which help to speed the process of absorption. 4) Place the following in the correct order: lungs expand, ribs rise, air enters lungs, external intercostals muscles contract, thorax expands. 5) Describe the path taken by a molecule of oxygen from the time it is breathed in through the nose, to the time it enters the heart in some oxygenated blood.