lecture 1

lecture 1 - Hydrophilic(small Help of special protein 3...

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lecture 1 22:47 Cellular physiology: a cell maintains an internal environment that is chemically  distinct from the external environment. Barrier=plasma membrane I. Transport across membrane A. Passive transport: no energy used, relies on gradient o 1.    Simple diffusion: hydrophobic/small 1. Steroids 2. O2 3. CO2                      2.facilitated diffusion:
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Unformatted text preview: Hydrophilic (small) Help of special protein: 3 types • Pores: size restriction (porins) holes in membrane • Channels: specific holes in membrane for a particular molecule • Carriers: shape changes, no hole (in book-permease) o Ions o Glucose (uses carrier) o Water • B. 22:47 • 22:47 •...
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lecture 1 - Hydrophilic(small Help of special protein 3...

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