BiologyQ1–2 of 2 questions
Page 1 of 1 · English
1
BiologyEasyMCQGSEB · 2014
Just as a person moves from Delhi to Shimla to escape the summer heat,where do thousands of migratory birds migrate from the extremely cold regions of Siberia and the North Pole?
A
Western Ghats
B
Meghalaya
C
Corbett National Park
D
Keoladeo National Park
Solution
(D) Thousands of migratory birds from the extremely cold regions of Siberia and the North Pole migrate to $Keoladeo$ $National$ $Park$ (formerly known as $Bharatpur$ $Bird$ $Sanctuary$) in $Rajasthan$,$India$,to escape the harsh winter conditions. This park provides a suitable habitat and food resources for these birds during the winter season.
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2
BiologyEasyMCQGSEB · 2014
Which chemicals produced by mast cells are responsible for allergy?
A
Adrenalin and Steroids
B
Histamine and Serotonin
C
Antibody and Penicillin
D
Antitoxin and Interferon
Solution
(B) Mast cells are specialized cells of the immune system that play a crucial role in allergic reactions.
When an allergen enters the body,it triggers mast cells to release various chemical mediators.
The primary chemicals released by mast cells during an allergic response are $Histamine$ and $Serotonin$.
$Histamine$ causes vasodilation and increased capillary permeability,leading to symptoms like swelling,redness,and itching.
Therefore,the correct option is $B$.
When an allergen enters the body,it triggers mast cells to release various chemical mediators.
The primary chemicals released by mast cells during an allergic response are $Histamine$ and $Serotonin$.
$Histamine$ causes vasodilation and increased capillary permeability,leading to symptoms like swelling,redness,and itching.
Therefore,the correct option is $B$.
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