Question:
Histamine is responsible for various physiological effects. Which of the following statements are correct?
• [(I)] Histamine is a potent vasodilator.
• [(II)] Histamine lowers blood pressure by constricting blood vessels.
• [(III)] Histamine is responsible for nasal congestion associated with common cold and allergies.
Histamine is responsible for various physiological effects. Which of the following statements are correct?
• [(I)] Histamine is a potent vasodilator.
• [(II)] Histamine lowers blood pressure by constricting blood vessels.
• [(III)] Histamine is responsible for nasal congestion associated with common cold and allergies.
• [(I)] Histamine is a potent vasodilator.
• [(II)] Histamine lowers blood pressure by constricting blood vessels.
• [(III)] Histamine is responsible for nasal congestion associated with common cold and allergies.
Show Hint
Antihistamines work by blocking the action of histamine and are commonly used to treat allergies, hay fever and cold-related symptoms.
Updated On: Jun 10, 2026
- I and II only
- II and III only
- I and III only
- I, II and III
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
Histamine is a biologically active amine released from mast cells and basophils during allergic reactions and inflammatory responses.
It plays an important role in vasodilation, allergic reactions, gastric secretion and inflammatory processes.
Step 1: Analyse Statement I Histamine causes dilation of blood vessels. Therefore: \[ \boxed{\text{Statement I is correct}} \]
Step 2: Analyse Statement II Histamine does not lower blood pressure by constricting blood vessels. In fact, it causes vasodilation. Therefore: \[ \boxed{\text{Statement II is incorrect}} \]
Step 3: Analyse Statement III Histamine is released during allergic reactions and contributes to:
• Sneezing
• Nasal congestion
• Runny nose
• Inflammation
Hence: \[ \boxed{\text{Statement III is correct}} \]
Final Conclusion Correct statements are: \[ I \text{ and } III \] Hence the correct option is \[ \boxed{\text{(C)}} \]
Step 1: Analyse Statement I Histamine causes dilation of blood vessels. Therefore: \[ \boxed{\text{Statement I is correct}} \]
Step 2: Analyse Statement II Histamine does not lower blood pressure by constricting blood vessels. In fact, it causes vasodilation. Therefore: \[ \boxed{\text{Statement II is incorrect}} \]
Step 3: Analyse Statement III Histamine is released during allergic reactions and contributes to:
• Sneezing
• Nasal congestion
• Runny nose
• Inflammation
Hence: \[ \boxed{\text{Statement III is correct}} \]
Final Conclusion Correct statements are: \[ I \text{ and } III \] Hence the correct option is \[ \boxed{\text{(C)}} \]
Was this answer helpful?
0
0
Top AP EAPCET Chemistry Questions
- The four quantum numbers of the valence electron of potassium are :
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
- In which of the following the election gain enthalpy of elements is correctly arranged?
- The radii of $ \text{F,}{{\text{F}}^{-}}\text{O} $ and $ {{\text{O}}^{2-}} $ are in the order
- Which of the following has the highest first ionization potential?
View More Questions
Top AP EAPCET Chemistry in Everyday Life Questions
- Identify the correctly matched pair from the following:
Match the following:
Which of the following reactions give phosphine?
i. Reaction of calcium phosphide with water
ii. Heating white phosphorus with concentrated NaOH solution in an inert atmosphere
iii. Heating red phosphorus with alkali- Which of the following pair is not correctly matched?
- Which of the following drug is used on diseased skin surface?
View More Questions
Top AP EAPCET Questions
- A body is projected from the ground at an angle of $\tan^{-1} \left( \frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
- The four quantum numbers of the valence electron of potassium are :
- A lens forms real and virtual images of an object, when the object is at $u_{1}$ and $u_{2}$ distances respectively. If the size of the virtual image is double that of the real image, then the focal length of the lens is (take, the magnification of the real image as $m$ )
- Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
View More Questions