Slide 6 Flashcards
1
Q
Histamine is a small and powerful molecule that controls ..
A
Histamine controls blood flow and immune responses
2
Q
Where is histamine stored?
A
In mast cells
3
Q
When is histamine released from mast cells?
A
When the body detects injury, allergens, or infection
4
Q
What does histamine bind to after being released ?
A
Histamin binds to histamine receptors (H1 and H2) on target cells
5
Q
What type of cells have H1 receptors?
A
Smooth muscle cells in the lungs and blood vessels
6
Q
What effect does histamine have on smooth muscles through H1 receptors?
A
Temporary contraction of smooth muscles
