Cell Membrane
Which macromolecule forms the structural component of the plasma membrane?
phospholipids
What pieces make up the plasma membrane?
the movement of a substance from an area of high concentration to an area of low concentration down the concentration gradient
who designed, built, and flew the worlds first successful airplane
the wright brothers
if the outside of the cell is isotonic compared to the inside of the cell, which way will water move?
there will be no water movement
the lipid component of the cell membrane is synthesized (created) from:
smooth ER
the membrane is most permeable to
small, hydrophobic, uncharged molecules
the solute concentration of the outside of the cell is equal to the solute concentration inside the cell
which founding father invented bifocals?
Benjamin Franklin
if the outside of the cell is hypotonic compared to the inside, which way will water move
inside the cell
only certain molecules can freely pass through
the membrane is the least permeable to
large, hydrophilic, charged molecules
movement of solvent molecules from a solution with a lower solute concentration to a solution with a higher solute concentration
osmosis
what city was the first capital of the United States
New York City
substances are brought into the cell by a vesicle
endocytosis
what is embedded within the membrane to assist in the transportation of molecules?
transport proteins
difference in solute concentration across the membrane is known as a _________
gradient
high solute concentration
hypertonic
what was the name of the treaty that ended the revolutionary war?
the treaty of paris
substances are brought out of the cell by a vesicle
exocytosis
why is the plasma membrane described as a fluid mosaic?
it is made of many different parts, and the phospholipids have the ability to move laterally, and rotate 360 degrees
the plasma membrane primarily functions as the:
gatekeeper of what leaves and enters the cell
low solute concentration
hypotonic
which two astronauts were the first humans to ever walk on the moon in July of 1969
Neil Armstrong and Buzz Aldrin
Involves the movement of molecules against a concentration gradient from low to high concentration. energy is required.
active transport