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Heart
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The organ responsible for pumping blood throughout the body.
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Heart rate
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The rate at which the heart contracts, expressed as beats/min
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Hertz (Hz)
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The unit that quantifies the frequency at which something occurs. 1 Hz=1/s.
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High fructose corn syrup
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The sweetener used in the beverage industry containing fructose and glucose, with fructose as the main carbohydrate.
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Histochemical
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Pertaining to histochemistry.
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Histochemistry
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The study of cells/tissue obtained from biopsy using tissue sectioning and subsequent staining of cell/tissue contents. Such sections/slices of tissue are examined using either or both of light and electron microscopy.
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Humid
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Having a high content of water vapor in the air
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Humidity
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The scale that quantifies the relative content of water vapor in the air; expressed as a % value of the maximal water holding capacity of the air at the given temperature.
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Hydrated
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Having adequate body water content due to appropriate fluid ingestion/infusion.
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Hydration
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Pertaining to the degree to which a person is hydrated.
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Hydrolysis
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Where a water molecule is used to assist in the removal of a functional group from a substrate during a chemical reaction.
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Hyperpnea
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Increased ventilation.
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Hyperventilation
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Excessive ventilation relative to the gas exchange and acid-base needs of the body.
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Hyponatremia
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The decrease in serum sodium to < 135 mEq/L.
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Hypoxia
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Lower than normal atmospheric oxygen.
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Hz
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The abbreviation for Hertz.
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