Lecture 7 - Active cell physiology Flashcards
1
Q
What is the cell membrane potential?
A
-70mV at resting potential
2
Q
Define diffusion
A
the movement of molecules down a concentration gradient, from high to low concentration
3
Q
Define osmosis
A
the movement of water across a membrane to equalise solute concentration
4
Q
Define hypertonic
A
HIGH tonicity/concentration side
5
Q
Define isotonic
A
EQUAL tonicity/concentration
6
Q
Define hypotonic
A
LOW tonicity/concentration
7
Q
EFC in terms of elements
A
High Na low K
8
Q
IFC in terms of elements
A
High K low NA
9
Q
Where does Ion excretion occur?
A
Sweat glands
10
Q
Where does ion absorption occur?
A
Small intestines and colon
11
Q
What creates a chemical gradient?
A
Uneven distribution of molecules across the membrane
12
Q
What creates a electrical gradient?
A
Uneven distribution of charges across the membrane
