Biology (BIO1A)
University Of California - Berkeley
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BIO 1A_23_Osmoregulation_Excretion_14- 2021 | Chapter 44 Osmoregulation and Excretion
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Chapter 44 
Osmoregulation and Excretion 
Controlling the internal environment 
Osmoregulation 
Nitrogenous wastes 
Excretory systems 
Mammalian excretory systems2 processes of homeostasis: 
1. Osmoregulation - regulation of solute balance 
and the gain and loss of water. 
2. Excretion of nitrogen containing waste products 
of metabolism. 
Controlling the Internal EnvironmentAquatic animals: 
Maintain water balance by compensating for net 
osmosis between external environment and internal 
fluid...
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