CBSE Class 11-science Answered
Expert Answer
Hi Nisha,
The steroid hormone responsible for combating fight or flight situation in the body is adrenaline or stress hormone. When excited or in anger, the adrenal medulla produces a lot of adrenaline. The gland is stimulated by the nerve ending of the autonomic nervous system.
Different parts of the body react differently in response to adrenaline.
|
Response to Adrenaline |
|||
|
Body Part |
Effects of Adrenaline |
Biological Advantage |
Effect or Sensation |
|
Heart |
Beats faster and blood pressure increases |
Sends more glucose and oxygen to the muscles |
Thumping heart |
|
Breathing centre of the brain |
Faster and deeper breathing |
Increased oxygenation of the blood and rapid removal of CO2 |
Panting |
|
Muscles of the body |
Tenses muscles |
Ready for immediate action |
Tense feeling, shivering |
|
Liver |
Conversion of glycogen to glucose |
Glucose available in blood for energy production |
No sensation |
|
Adrenaline also causes dilation of the pupil of the eyes, stimulates uterine contraction during delivery and increases the clotting capacity of blood. |
|||
Concept Videos
-
The Living World
The Living World, Features of Living Beings, Diversity in the Living World -
Biological Classification
Biological Classification, Kingdom: Fungi, Plantae, Animalia -
Biological Classification
Biological Classification, Kingdom: Fungi, Plantae, Animalia -
Biological Classification
Biological Classification, Virus, Viroids and Lichens -
Biological Classification
Biological Classification, Kingdoms: Monera and Protista
ANSWERED BY EXPERT
ANSWERED BY EXPERT
ANSWERED BY EXPERT ANSWERED BY EXPERT ANSWERED BY EXPERT ANSWERED BY EXPERT
ANSWERED BY EXPERT ANSWERED BY EXPERT ANSWERED BY EXPERT
