1.3 Co-transport Flashcards
1
Q
Define co-transport.
A
Co transport is the name of a process in which two substances are simultaneously transported across a membrane by one protein.
2
Q
Give an example of co-transport
A
Sodium and glucose in the small intestine
3
Q
Where is the Na+K pump present?
A
In the cell membranes of all animal cells.
4
Q
The Na+K protein pump the most ___ and ____ of all membrane pumps.
A
Abundant & important.
5
Q
What does the Na+K protein pump pump OUT of the cell?
A
Three sodium ions.
6
Q
What does the Na+K protein pump pump INTO the cell?
A
Two potassium ions.
7
Q
How much energy does an Na+K protein pump use in most cells?
A
30%
8
Q
How much energy does an Na+K protein pump use in a nerve cell?
A
70%
