Chapter 3 Test Flashcards
Transport allows a cell to __________ and _________ compounds according to it’s biological ______________
Take in, release, function
What is cellular transport?
The movement of compound and across the cell membrane
Transport allows cells to __________ its characteristics
Regulate
The cell is composed of a ____________ of ___________ and ____________
Bilayer, lipids, proteins
Two reasons that prevent atoms from passing through a membrane are _________ and __________
Size, polarity
________ molecules will not pass through due to their size
Large
Polar molecules will _________ pass through due to their _________ or attraction to H2O molecules and because they cannot pass through the _________ membrane
Not, affinity, nonpolar
Due to small __________ in the cell membrane, small _________ molecules such as H2O can pass through. Large polar molecules such as ________ can also pass through but not as easily.
Vibration, polar, glucose
Diffusion-net movement of solutes occurs from regions of __________ to regions of __________
High concentration, low concentration
Osmosis-water molecules will flow from a low ________ concentration into a high ________ concentration to produce a more _________ solute concentration
Solute, solute, equal
___________ facilitate the passage of molecules across a membrane
Membrane proteins
Passive transport occurs in 3 steps
Bind, change shape, release
Passive transport moves solutes from an area of _________ concentration to an area of __________ concentration
High, low
3 examples of molecules that move into a cell via passive transport
Oxygen, glucose, water
An example of an active transport system is _________________________
ATP Pump to move Sodium and Potassium in and out of the cell
Unlike passive transport, active transport can move solutes from an area of low _________ to an area of high _________ against equilibrium
Concentration
ATP Pump are present in ______ and particularity in ________
All cells, nerve cells
Sodium Potassium pump- pumps 3 ________ out of the cell and 2 _______ into the cell
Na+, K+
This pump creates an __________ making the exterior of the cell more _________ than the interior of the cell
Electrical potential, positive
ATP releases a ____________ to provide energy required for the Na+ K+ pump to open and release ________ions
Phosphate, Na
A phosphate binds to _________ to produce another _______ when K+ is released into the cell
ADP, ATP
