Chapter 7 Flashcards
(4 cards)
1
Q
Passive transport- Diffusion
A
Diffusion of a substance across a biological membrane
Move down in concentration in gradient- from high to low
No energetic is expended
2
Q
Active transport
A
3 types
Uniporter- only 1 type of molecule
Synporter-2 different molecule transported in the same direction
Antiporter- 2 different molecules are transported in opposite directions
Requires energy- ATP
ANTIPORTER EX potassium pump
3
Q
3 stages of cell signaling
A
Reception
Transduction
Response
4
Q
Cell signaling- Reception
A
Receptor protiens are found
Hormone receptor complex— acts as a transcription factor
