Flashcards in Exam #3 Deck (183)
Where do you find a concentration of potassium about the cell?
______ out, ________ in
The sodium/potassium pump moves sodium ____ of the cell and potassium ____ the cell
What source of energy? (Na/K pump)
ATP has three phosphates on it...by breaking off a phosphate, you liberate _______
So ATP becomes ___ and a _____ _______ _______
ADP, free inorganic phosphate
The Na/K Pump is essential to maintaining ___________ in animal cells
Secondary (2º) active transport involves the movement of ____ substances.
What are those two substances?
1) The MOLECULE you're intending to transport
2) The ION that's driving the transport
Since two substances are always transported by secondary active transport, sometimes it's called "__________", since you're actually moving two substances across the membrane at the same time.
How is the sodium providing energy for the glucose to come in? What's so energetic about this sodium ion?
It is arranged in a GRADIENT. There's more outside than inside, it wants to go down!
So how does the ion provide energy?
It's in a gradient
Does secondary (2º) active transport require ATP?
Is primary (1º) active transport driven by ATP?
Source of energy..... (direct/indirect ATP use)
Primary (1º) active transport:
Secondary (2º) active transport:
Primary (1º) active transport: direct ATP use
Secondary (2º) active transport: indirect ATP use
Plant cells do it another way...they have primary active transport that pumps _______ outside of the cell.
What fuels secondary active transport?
It's always an ____ _______ providing that energy.
Channels can be referred to as "_____."
We have a way of forcing a substance up the concentration gradient. How does that work? Well, you provide ______,. Either the energy is ___, and that's going to generally pump ______ across the membrane.
Or the second way it could work is _________ _______ ______ where we use an ____ gradient as a source of energy.
energy, ATP, ions, secondary active transport, ion
We can move stuff out of the cell, or bring stuff in. If we move stuff out, we call that ________. If we move stuff in, we call that _________.
Exocytosis is simply ________
_________ is an example of endocytosis. "Eating"
Phagocytosis is generally ___-______. A lot of substances can come into the cell by phagocytosis
Receptor mediated endocytosis depends upon a ______ in the cell membrane.
receptor. What type of molecule is a receptor? It's a PROTEIN.
So receptor mediated endocytosis is a very ______ mechanism of transport
Energy that is available is called ______ _______.
What fuels metabolism?
The building of biochemistry is what?