Active and Passive Transport Flashcards
(37 cards)
Is diffusion active or passive
passive
Are protein pumps active or passive
active
Is facilitated diffusion active or passive
passive
Is Endocytosis/ Exocytosis active or passive
active
Is Osmosis active or passive
passive
Is osmotic pressure active or passive
passive
Does passive transport require energy?
little to none
Which way in passive transport does the substance move along the concentration gradient?
down
In passive transport does a substance move from high to low concentration?
yes
Does active transport require energy
yes
In active transport does a substance move from low to high concentration?
yes
What type of energy does passive transport use?
Adenosine triphosphate (ATP)
Which way in active transport does the substance move along the concentration gradient?
against
What is diffusion
the process by which molecules move from a position of high concentration to a position of lower concentration
What physical variables is diffusion heavily dependent on
temperature, size of the molecule, and type of medium
What is facilitated diffusion?
the passive movement of molecules along the concentration gradient
In facilitated diffusion is there specific and nonspecific channels
yes
In facilitated diffusion do protein channels act like tunnels
yes
is energy required in facilitated diffusion
no
What is osmosis?
movement of water across a selectively permeable membrane
In osmosis what is the special protein channels
aquaporins
When water moves does it require cellular energy
no
which way does water move down the concentration gradient
high to low
What is osmotic pressure
the pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
