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Alveolar gas exchange

Tiny balloon walls trade gases by diffusion

In the lungs, oxygen and carbon dioxide exchange across the alveolar-capillary membrane by diffusion. High surface area, thin walls, and ventilation-perfusion matching support this process. Partial pressure gradients, not active transport, drive the exchange.

Does not describe gas transport in blood, such as hemoglobin binding or bicarbonate buffering.

Further reading · OpenStax science textbooks ↗

Amino acid backbone

One carbon, one amino, one acid, one side chain

All standard amino acids share the same alpha carbon attached to an amino group, a carboxyl group, a hydrogen, and a variable R group. The R group determines chemical behavior. Glycine is the exception because its R group is H, making it achiral.

Applies to the 20 standard alpha-amino acids; glycine is achiral because its R group is H.

Further reading · OpenStax science textbooks ↗

Amphipathic phospholipids

Soap-dish molecules love both water and oil

Phospholipids are amphipathic: hydrophilic heads interact with water, while hydrophobic tails avoid it. In water they spontaneously form bilayers, micelles, or vesicles depending on geometry. This self-assembly underlies membrane formation.

Best applies in aqueous environments; membrane behavior also depends on cholesterol and temperature.

Further reading · OpenStax science textbooks ↗

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Prepared library examples. Opening these does not contact AI or use your allowance.

Alveolar gas exchange

Tiny balloon walls trade gases by diffusion

Does not describe gas transport in blood, such as hemoglobin binding or bicarbonate buffering.

Further reading · OpenStax science textbooks ↗

Amino acid backbone

One carbon, one amino, one acid, one side chain

Applies to the 20 standard alpha-amino acids; glycine is achiral because its R group is H.

Further reading · OpenStax science textbooks ↗

Amphipathic phospholipids

Soap-dish molecules love both water and oil

Best applies in aqueous environments; membrane behavior also depends on cholesterol and temperature.

Further reading · OpenStax science textbooks ↗

Opening your tutor…

See a connection click.

Prepared library examples. Opening these does not contact AI or use your allowance.

Alveolar gas exchange

Tiny balloon walls trade gases by diffusion

Does not describe gas transport in blood, such as hemoglobin binding or bicarbonate buffering.

Further reading · OpenStax science textbooks ↗

Amino acid backbone

One carbon, one amino, one acid, one side chain

Applies to the 20 standard alpha-amino acids; glycine is achiral because its R group is H.

Further reading · OpenStax science textbooks ↗

Amphipathic phospholipids

Soap-dish molecules love both water and oil

Best applies in aqueous environments; membrane behavior also depends on cholesterol and temperature.

Further reading · OpenStax science textbooks ↗

A fresh way to understand.

Your study space

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Your study space

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Your study space

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Your study space

A fresh way to understand.

Your study space

A fresh way to understand.

Make the connection yours.

Your study space

A fresh way to understand.

Make the connection yours.

Your study space

Make the connection yours.

Make the connection yours.

Make the connection yours.