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BIOL 1105 - Lesson 3 exam with 100- correct answers 2025.
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BIOL 1105 - Lesson 3 exam with 100- correct answers 2025.
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BIOL 1105 - Lesson 3 exam with100% correct answers 2025
acid
molecule that donates hydrogen ions and increases the
concentration of hydrogen ions in a solution; substance that
dissociates in water to increase the H+ concentration
adhesion
attraction between water molecules and other molecules; Cell
Adhesion - allow one cell to attach to another cell or to the
extracellular matrix; Polarity of water promotes the attraction of
water molecules for other water molecules; Adhesion of water to
charged surface drives capillary action
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Amphipathic
A molecule that has both a hydrophilic region and a hydrophobic
region; Hydrophobic and hydrophilic regions - amphipathic
molecules
, atom
the smallest unit of matter that retains all of the chemical
properties of an element; consists of a nucleus surrounded by
electrons; An atom is composed of two regions; The nucleus is the
atom's center, contains protons and neutrons; The atom's outermost
region hold the electrons that orbit around the nucleus; All
electrically neutral atoms have the same number of electrons and
protons
atomic mass
calculated mean of the mass number for an element's isotopes;
number under the letter of the element
base
molecule that donates hydroxide ions or otherwise binds excess
hydrogen ions and decreases the hydrogen ions' concentration in a
solution; substance that dissociates to decrease the H+
concentration
bohr model
model of the atom in which electrons move rapidly around the
nucleus in paths called orbits;
buffer
substance that prevents a change in pH by absorbing or releasing
hydrogen or hydroxide ions; resists change to pH
chemical bond
interaction between two or more of the same or different atoms that
results in forming molecules
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