Medical Pharmacology: Histamine and Bradykinin
Practice Questions
Click on the correct answer.
Kinin metabolism:
- Metabolized by nonspecific exopeptidases
- Metabolized by endopeptidases
- Both
- Neither
Bradykinin is nearly completely inactivated by hydrolysis during the singular pulmonary vascular bed passage.
- True
- False
Plasma kininase(s) [endopeptidases and exopeptidases] characteristic(s):
- Kininase I: Hepatic synthesis
- Kininase II: localized in vascular endothelial cells in plasma
- Both
- Neither
With respect to mediation of arteriolar dilation, histamine is about 10 times more potent compared to kinins.
- True
- False
Vascular bed(s) that exhibit vasodilation due to kinins:
- Skeletal muscle
- Kidney
- Both
- Neither
Probable mechanism associated with kinin-related arteriolar dilation:Kinin effects dependent on promoting nitric oxide release
- True
- False
-
Choose the correct statement(s) concerning bradykinin-induced bronchoconstriction:
- This action is inhibited by anticholinergic drugs
- This action is inhibited by antihistamines
- This action is inhibited by cyclooxygenase inhibitors
- All of the above
Kinins and inflammatory reactions:
- Kinins reduce microcirculatory permeability
- Kinins induce edema
- Both
- Neither
Kinins are likely involved in both asthma and rhinitis.
- True
- False
Kinins and pain: choose the correct statement/statements:
- Kinins are pain-inducing agents.
- Kinins activate primary sensitive neurons.
- Kinins induce release of neuropeptides involved in pain such as substance P
- A & B
- A & C
- A, B & C
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