L2 Flashcards
1
Q
Composition of the cell membrane
A
Lipids, Proteins and Carbohydrates
2
Q
Main ionic components of intra/ extracellular fluids
A
Na+, K+, Ca2+, HCO3-, Cl-, PO4 3-, Proteins
3
Q
Na+ levels
A
High outside
Low inside
- Very important in excitable cells
4
Q
K+ levels
A
High inside
Low outside
5
Q
Ca2+ levels
A
Higher extracellular
Lower intracellular
- Still not a lot anyway
6
Q
HCO3- levels
A
similar inside and outside - 25mmol
pH controlling buffer
7
Q
Cl- levels
A
High extracellular (100mmol) Low intracelluar
8
Q
PO4 3- levels
A
High intracellular - bound in ATP inside the cell
9
Q
Protein levels
A
lots inside the cell
10
Q
Main ions outside and inside the cell
A
Inside: K+, PO4 3-, Proteins
Outside: Na+, Ca2+, Cl-
11
Q
Types of transporters in the cell membrane
A
- Carriers
- Pumps
- Ion channels
12
Q
Active transport
A
Done by pumps
Against electrochemical gradient
Low turnover
