L19. Cell Communication Flashcards
1
Q
How does electrical transmission (cell communication) between cells occur?
A
Through “gap junctions”
2
Q
What do gap junctions allow?
A
A current to flow from cell to cell.
3
Q
Name a substance which can and cannot pass through the cell membrane.
A
Steroids can pass through
Peptides cannot
4
Q
Describe how a non-steroid hormone converts substrate to product inside the cell.
A
Non-steroid hormone binds to receptor activating G proteins by GTP.
Adenyl cyclase changes ATP to cAMP.
cAMP activates protein kinases which activate enzymes.
The enzyme converts substrate to product.
