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Beck

the movement of molecules from a high concentration to a low concentration is called:

diffusion

diffusion of water through a semipermeable membrane is called:

osmosis

the movement of substances from lower to higher concentration across a semi permeable membrane that must have a specific protein carrier and cell expenditure of energy is called:

active transport

the movement of substances fromhigher to lower concentration across a semi permeable membrane that must have a specific protein carrier but no energy expenditure is called:

facilitated diffusion

the use of energy by the cell to enclose a substance in its membrane by froming a vacuole and engulfing it is called:

endocytosis

bacteria that live in fresh water are moved to cell water, they will

shrivel

Does endocytosis require the cell to use ATP?

yes

when whole cells or large molecules are engulfed by the cell, this endocytosis is specifically called:

phagocytosis

In what kind of conditions will the cell wall prevent the cell from bursting

hypotonic

energy expenditure is not required
substances exist in a gradient and move from areas of high to low concentration in the gradient

passive transport

examples of passive transport

diffusion and facilitated diffusion

a fundamental property of atoms and molecules that exist in a state of random motion

diffusion

molecule binds to a receptor in membrane and is carried across other side

facilitated diffusion

nonspecific Brownian movement

qualities of diffusion

molecule specific
transport both ways

qualities of facilitated diffusion

energy expenditure is required
rate of transport is increased
transport may occur against a concentration gradient

active transport

3 examples of active transport

carrier mediated active transport, group translocation and bulk transport

atoms or molecules are pumped into or out of the cell by specialized receptors.
driven by ATP or the proton motive force

carrier-mediated active transport

molecule is moved across membrane and simultaneously converted to a metabolically useful substance

group translocation

mass transport of large particles, cells, and liquids by engulfment and vesicle formation

bulk transport

transports simple sugars, amino acids, inorganic ions (Na and K)

qualities of carrier-mediated active transport

alternate system for transporting nutrients (sugars, amino acids)

qualities of group translocation

includes endocytosis, phagocytosis and pinocytosis

qualities of bulk transport

troph

food

phile

to love

obe

to live

hetero

other

photo

light

chemo

chemical

sapro

rotton

thermo

heat

psychro

cold

aero

air (oxygen)

obligate or strict

being restricted to a narrow niche or habitat

facultative

means not being restricted to a narrow habitat

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