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Lecture 2

NUTR 120 Lecture Notes - Lecture 2: Sucrase, Anabolism, Long Term Ecological Research Network

3 pages56 viewsFall 2016

Department
Nutrition
Course Code
NUTR 120
Professor
Bodo, Mackenzie
Lecture
2

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chemistry and physiology
chemistry
study of composition and characteristics of matter
human physiology
study of how human body functions
humans are made up of chemicals, mostly organized into cells
matter is made up of atoms that contain:
-protons: positively charged particles in the nucleus
-electrons: negatively charged particles that surround the nucleus in a “cloud”
ions
electrically charged atom or group of atoms
-form when the atom of group of atoms gains or loses 1 or more electrons
negative charge: gain of an electron
positive charge: loss of an electron
elements
there are over 100 types of atoms, and each is an element
-cannot be separated into simpler substances
-building blocks of matter
there are elements in the body (i.e. hydrogen, oxygen, carbon, nitrogen, calcium, sulfur,
copper, manganese, selenium, etc)
molecule
matter that forms when 2 or more atoms interact and are held together by a chemical
bond
chemical bond
attraction that holds atoms together to form a molecule
i.e. some atoms form single bonds such a hydrogen (carbon atoms may form single,
double, or triple bonds)
compound
molecule that contains 2 or more different elements
solution
evenly distributed mixture of 2 or more compounds
-the two compounds in a solution are
solvent: the primary component
solute: lesser component that is dissolved into solvent
solubility
how easily a substance dissolves into a liquid
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