BIOL 1201 exam 2 Gregg Questions With
Correct Answers
Plasma membrane - CORRECT ANSWER✔✔-A selectively-permeable phospholipid
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|bilayer forming the boundary of the cells. Hydrophilic heads and hydrophobic
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tails
peripheral proteins - CORRECT ANSWER✔✔-Bound to the surface of the
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membrane
Integral proteins - CORRECT ANSWER✔✔-penetrate the hydrophobic core
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Transport proteins - CORRECT ANSWER✔✔-Span membrane. Allow passage of
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hydrophilic substances |
functions of plasma membrane - CORRECT ANSWER✔✔-transport, enzymatic
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activity, signal transduction, cell-cell recognition, intercellular joining, attachment
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to cytoskeleton and ECM. Remember that carbs in cell= cell recognition
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Permeability - CORRECT ANSWER✔✔-The easiest= small, non polar. Hardest=
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large ions |
Hydrophobic (non polar) - CORRECT ANSWER✔✔-Dissolve in lipid bilayer and
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pass through membrane
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, Hydrophilic (ions/ polar) - CORRECT ANSWER✔✔-Do not cross easily
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passive transport - CORRECT ANSWER✔✔-Diffusion of a substance with no
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energy used. Uses carrier protein. For polar and hydrophobic
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Diffusion - CORRECT ANSWER✔✔-Tendency for molecules to spread out into
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available space |
Osmosis - CORRECT ANSWER✔✔-diffusion of water across a selectively
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permeable membrane |
How does water diffuse - CORRECT ANSWER✔✔-Area of low to high until equal
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Hypotonic (we always refer to environment) - CORRECT ANSWER✔✔-Water
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rushes inside (cell bursts) normal in plant cells
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hypertonic - CORRECT ANSWER✔✔-Solution leaves cell (cell shrivels)
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Isotonic - CORRECT ANSWER✔✔-Solution is equal!
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facilitated diffusion - CORRECT ANSWER✔✔-Passive transport with help by
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proteins |
Ion channels- facilitate transport ions
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Gated channels- open/ close
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Correct Answers
Plasma membrane - CORRECT ANSWER✔✔-A selectively-permeable phospholipid
| | | | | |
|bilayer forming the boundary of the cells. Hydrophilic heads and hydrophobic
| | | | | | | | | | |
tails
peripheral proteins - CORRECT ANSWER✔✔-Bound to the surface of the
| | | | | | | | | |
membrane
Integral proteins - CORRECT ANSWER✔✔-penetrate the hydrophobic core
| | | | | | |
Transport proteins - CORRECT ANSWER✔✔-Span membrane. Allow passage of
| | | | | | | | |
hydrophilic substances |
functions of plasma membrane - CORRECT ANSWER✔✔-transport, enzymatic
| | | | | | | |
activity, signal transduction, cell-cell recognition, intercellular joining, attachment
| | | | | | | |
to cytoskeleton and ECM. Remember that carbs in cell= cell recognition
| | | | | | | | | |
Permeability - CORRECT ANSWER✔✔-The easiest= small, non polar. Hardest=
| | | | | | | | |
large ions |
Hydrophobic (non polar) - CORRECT ANSWER✔✔-Dissolve in lipid bilayer and
| | | | | | | | | |
pass through membrane
| |
, Hydrophilic (ions/ polar) - CORRECT ANSWER✔✔-Do not cross easily
| | | | | | | |
passive transport - CORRECT ANSWER✔✔-Diffusion of a substance with no
| | | | | | | | | |
energy used. Uses carrier protein. For polar and hydrophobic
| | | | | | | |
Diffusion - CORRECT ANSWER✔✔-Tendency for molecules to spread out into
| | | | | | | | | |
available space |
Osmosis - CORRECT ANSWER✔✔-diffusion of water across a selectively
| | | | | | | | |
permeable membrane |
How does water diffuse - CORRECT ANSWER✔✔-Area of low to high until equal
| | | | | | | | | | | |
Hypotonic (we always refer to environment) - CORRECT ANSWER✔✔-Water
| | | | | | | | |
rushes inside (cell bursts) normal in plant cells
| | | | | | |
hypertonic - CORRECT ANSWER✔✔-Solution leaves cell (cell shrivels)
| | | | | | |
Isotonic - CORRECT ANSWER✔✔-Solution is equal!
| | | | |
facilitated diffusion - CORRECT ANSWER✔✔-Passive transport with help by
| | | | | | | | |
proteins |
Ion channels- facilitate transport ions
| | | |
Gated channels- open/ close
| | |
