HTHSCI 1LL3 Chapter Notes - Chapter 4: Histidine, Intracellular Ph, Carbonic Anhydrase
11 Nov 2017
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Because fat doesn"t associate with water, obese people have a lower percentage of body water than thin people, women tend to have a lower percentage than men, and older people have a lower percentage than younger people. The dipolar nature of water allows it to form hydrogen bonds and participate in hydration shells. Hydrogen bond: a weak non covalent interaction between the hydrogen of one molecule and the more electronegative atom of an acceptor molecule. Oxygen can form h bonds with 2 other water molecules , so each water molecule if hydrogen bonded to approx 4 neighbouring water molecules. Organic molecules with lots of electronegative atoms are soluble in water because atoms participate in hydrogen bonding with water molecules. Water"s heat of fusion is high, so a large drop in temperature is needed to covert liquid water to solid ice. Thermal conductivity of water is high, facilitating heat dissipation from high energy using areas (brain into blood)
