The surfaces of the cells that form the alveoli (small air spaces of the lung) are coated with surfactant, which decreases the alveolar surface tension. 

Lung surfactant contains 80 to 90% phospholipid by weight, and 70 to 80% of the phospholipid is phosphatidylcholine, mostly the dipalmitoyl species.

TLS Online TPP Program

#Id: 5179

#Unit 7. System Physiology – Animal

Serum has essentially the same composition as plasma, except that its fibrinogen and clotting factors II, V, & VIII have been removed.

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#Id: 5277

#Unit 7. System Physiology – Animal

Large quantities of positive potassium ions diffuse out of the SA node.

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#Id: 8986

#Unit 11. Evolution and Behavior

Calculation of Allelic Frequencies

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#Id: 10452

#Unit 4. Cell Communication and Cell Signaling

Philadelphia chromosome generated by a translocation

between chromosomes 22 and 9

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#Id: 4929

#Unit 1. Molecules and their Interaction Relevant to Biology

Lineweaver-Burk plot showing the effect of uncompetitive inhibition; (b) the same, showing plots for several inhibitor concentrations at fixed enzyme concentration.