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Science Foundations II
Cell Transport 1
15
Health Care
Professional
12/13/2008

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Cards

Term
Where does lipid biosynthesis occur?
Definition
Primarily in the smooth ER-makes triglycerides, steroids, and phospholipids
Term
What are the fates of the synthesized lipids/lipoproteins?
Definition
Transition vesicles, membranes, or secreted into plasma.
Term
Phosphotidylserine
Definition
A phospholipid located exclusively in the cytoplasmic leaflet of the membrane.
Term
What are 4 gradients that determine the movement of substances from a high to low energy state?
Definition
Pressure, concentration, voltage, and osmotic.
Term
Osmosis
Definition
Movement of water through a semi-permeable membrane. Water moves from an area of low solute to an area of high solute.
Term
Tonicity equals osmolarity....
Definition
...ONLY when non-penetrating solutes are present in solution.
Term
A cell placed in hypotonic solution...
Definition
...will swell/burst.
Term
A cell place in hypertonic solution...
Definition
...will shrink/shrivel.
Term
Receptors
Definition
Bind molecules with specific properties.
Term
Recognition proteins
Definition
Allow the immune system to distinguish foreign organisms from normal body cells.
Term
Transport proteins
Definition
Permit polar compounds and ions to cross the cell membrane. May also acts as enzymes.
Term
Junctional proteins
Definition
Form links between adjacent cells.
Term
Enzymes
Definition
Catalyze specific reactions on the intracellular or extracellular membrane surface.
Term
Cytoskeleton anchors
Definition
Attach the cytoskeleton to the cell surface
Term
Aquaporin
Definition
a protein in RBC plasma membranes that appears to form water channels in the membrane to allow water to flow freely into and out of the cell.
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