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Which gland secretes hormones involved in the 'fight or flight' response?
- a)Thyroid gland
- b)Adrenal medulla
- c)Pancreas
- d)Parathyroid gland
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which gland secretes hormones involved in the 'fight or flight' respon...
The adrenal medulla secretes catecholamines like adrenaline and noradrenaline, which are crucial for the 'fight or flight' response.
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Which gland secretes hormones involved in the 'fight or flight' respon...
Introduction
The 'fight or flight' response is a physiological reaction that occurs in response to a perceived threat, involving several hormones that prepare the body for rapid action. The gland primarily responsible for secreting these hormones is the adrenal medulla.
Adrenal Medulla's Role
- The adrenal medulla is the inner part of the adrenal glands, located on top of each kidney.
- It is responsible for releasing catecholamines, primarily adrenaline (epinephrine) and norepinephrine.
Hormones Involved
- Adrenaline (Epinephrine): Increases heart rate, dilates air passages, and boosts energy supplies.
- Norepinephrine: Works alongside adrenaline to increase blood flow to muscles and elevate blood pressure.
Effects on the Body
- These hormones trigger several immediate physiological changes, such as:
- Increased heart rate and blood pressure.
- Dilated pupils for improved vision.
- Enhanced energy availability by mobilizing glucose and fatty acids.
- Dilation of bronchial passages for better oxygen intake.
Comparison with Other Glands
- Thyroid Gland: Produces hormones that regulate metabolism but is not directly involved in the 'fight or flight' response.
- Pancreas: Secretes insulin and glucagon, which regulate blood sugar levels but do not initiate the stress response.
- Parathyroid Gland: Regulates calcium levels in the blood and has no role in acute stress responses.
Conclusion
In summary, the adrenal medulla is crucial for the 'fight or flight' response, as it secretes hormones like adrenaline and norepinephrine that prepare the body for immediate action in stressful situations.
The 'fight or flight' response is a physiological reaction that occurs in response to a perceived threat, involving several hormones that prepare the body for rapid action. The gland primarily responsible for secreting these hormones is the adrenal medulla.
Adrenal Medulla's Role
- The adrenal medulla is the inner part of the adrenal glands, located on top of each kidney.
- It is responsible for releasing catecholamines, primarily adrenaline (epinephrine) and norepinephrine.
Hormones Involved
- Adrenaline (Epinephrine): Increases heart rate, dilates air passages, and boosts energy supplies.
- Norepinephrine: Works alongside adrenaline to increase blood flow to muscles and elevate blood pressure.
Effects on the Body
- These hormones trigger several immediate physiological changes, such as:
- Increased heart rate and blood pressure.
- Dilated pupils for improved vision.
- Enhanced energy availability by mobilizing glucose and fatty acids.
- Dilation of bronchial passages for better oxygen intake.
Comparison with Other Glands
- Thyroid Gland: Produces hormones that regulate metabolism but is not directly involved in the 'fight or flight' response.
- Pancreas: Secretes insulin and glucagon, which regulate blood sugar levels but do not initiate the stress response.
- Parathyroid Gland: Regulates calcium levels in the blood and has no role in acute stress responses.
Conclusion
In summary, the adrenal medulla is crucial for the 'fight or flight' response, as it secretes hormones like adrenaline and norepinephrine that prepare the body for immediate action in stressful situations.
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