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The transport of oxygen from lungs to muscle cells II

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The transport of oxygen from lungs to muscle cells II Powered By Docstoc
					Transport of O2 from the air in the alveoli of the lungs to the cytoplasm of
                         a respiring muscle cell.


 Prokaryotes           Protoctists             Fungi                Plants             Animals



Cell biology         Biochemistry          Physiology            Genes and             Ecology
                                                                  genetics


Gas exchange           Nutrition          Homeostasis          Co-ordination         Reproduction
and transport                             and excretion        and movement           and growth




Gas exchange           Nutrition          Homeostasis         Co-ordination         Reproduction
and transport                             and excretion       and movement           and growth

Gas exchange.       Oxygen needed
                    for respiration
Diffusion into
cell. – Fick’s       mitochondria
      law

Circulation and
 haemoglobin




Introduction:
Oxygen is needed by all the cells in the body. Why is oxygen needed? ATP
production/energy release/ via electron transport chain (final electron acceptor)
Needed for energy. Pathway: Inspiration>lungs>blood>cells>mitochondria

Paragraph 1: Air in alveoli. Gas exchange surface. Diffusion into blood. Fick’s law. Partial
pressures.

Paragraph 2: Circulation. From the lungs to the muscle cell. Through heart,

Paragraph 3: HAEMOGLOBIN. How it carries O2. . Haemoglobin dissociation means that
all cells have all the O2 that they need.

Paragraph 4: Diffusion into cell. Membrane. How it travels through the cytoplasm

Paragraph 5: Mitochondria. How O2 used.

Conclusion:Very well adapted to transporting oxygen. Alveoli and cell membranes specially
designed

				
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posted:11/6/2011
language:English
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