Podcast
Questions and Answers
Which cells are among the richest sources of histamine?
Which cells are among the richest sources of histamine?
- Mast cells (correct)
- T cells
- Macrophages
- Eosinophils
What triggers the release of histamine from mast cells?
What triggers the release of histamine from mast cells?
- Binding of antibodies to T cells
- Activation of B cells
- Activation of macrophages
- Binding of antibodies to mast cells (correct)
What is the effect of histamine on arterioles and venules?
What is the effect of histamine on arterioles and venules?
- Causes constriction of arterioles and decreases the permeability of venules
- Causes irregular dilation and constriction of arterioles and venules
- Has no effect on arterioles and venules
- Causes dilation of arterioles and increases the permeability of venules (correct)
Which receptors does histamine bind to on microvascular endothelial cells?
Which receptors does histamine bind to on microvascular endothelial cells?
What type of drugs are H1 receptor antagonists?
What type of drugs are H1 receptor antagonists?
Which of the following triggers the release of histamine from mast cells?
Which of the following triggers the release of histamine from mast cells?
Which of the following is NOT a trigger for the release of histamine from mast cells?
Which of the following is NOT a trigger for the release of histamine from mast cells?
Which of the following is a function of histamine?
Which of the following is a function of histamine?
What triggers the release of histamine from mast cells in immediate hypersensitivity (allergic) reactions?
What triggers the release of histamine from mast cells in immediate hypersensitivity (allergic) reactions?
Which of the following is a source of histamine?
Which of the following is a source of histamine?
Flashcards
Mast Cells
Mast Cells
Cells that are rich in histamine stores and play a key role in allergic reactions.
Histamine Release Trigger
Histamine Release Trigger
The process initiated by antibody binding to mast cells, leading to histamine release.
Histamine Effect on Blood Vessels
Histamine Effect on Blood Vessels
Histamine causes dilation of arterioles and increases venule permeability, leading to inflammation.
H1 Receptors
H1 Receptors
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Antihistamine Drugs
Antihistamine Drugs
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Anaphylatoxins
Anaphylatoxins
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Non-Triggers for Histamine Release
Non-Triggers for Histamine Release
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Function of Histamine
Function of Histamine
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Immediate Hypersensitivity Trigger
Immediate Hypersensitivity Trigger
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Source of Histamine
Source of Histamine
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