unit 3 - transport across the cell membrane Flashcards
1
Q
importance of Na+/K+ pump
A
allows for transmission of electrical signals in nervous system, muscle contraction. high concentration of Na+ on outside of membrane can be used for coupled transport
2
Q
importance of Ca2+ pump
A
low concentrations of Ca2+ mean that small changes in its concentration can be used to send signals.
roles include exocytosis, contraction, metabolism, gene transcription, fertilization
3
Q
uniporter
A
1 substance transportated against concentration gradient using atp
4
Q
symport
A
2 substances transported, one along and one against concentration gradient, in the same direction
5
Q
antiport
A
substances transported in opposite directions
6
Q
A
