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A student is about to appear for an examination in the next half an hour . He is extremely anxious . His face is flushed and his heartbeat has increased . Which of the following could be a probable reason for this ?

A

Secretion of sleep - regulating hormones by the pineal gland

B

Secretion of glucocorticoids by the adrenal cortex

C

Secretion of TSH by the thyroid gland

D

Secretion of emergency hormones by the adrenal medulla

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the symptoms presented and the options provided. ### Step-by-Step Solution: 1. **Identify the Symptoms**: The student is experiencing anxiety, flushed face, and increased heartbeat. These symptoms suggest a physiological response to stress or anxiety. 2. **Understand the Physiological Response**: When a person is anxious or under stress, the body activates the "fight or flight" response. This response is primarily mediated by the release of certain hormones. 3. **Review the Options**: - **Option 1**: Secretion of the sleep-regulating hormone by the pineal gland (Melatonin). This option is incorrect because melatonin is associated with sleep, not stress or anxiety. - **Option 2**: Secretion of glucocorticoid by the adrenal cortex. While glucocorticoids (like cortisol) are involved in stress responses, they do not directly account for the immediate symptoms of increased heart rate and flushed face. - **Option 3**: Secretion of Thyroid Stimulating Hormone (TSH). This option is incorrect as TSH is related to metabolism and does not directly influence acute stress responses. - **Option 4**: Secretion of emergency hormones by the adrenal medulla. This is the correct option because during stressful situations, the adrenal medulla releases adrenaline (epinephrine) and norepinephrine, which lead to increased heart rate and blood flow, causing the flushed face and heightened alertness. 4. **Conclusion**: The most probable reason for the student's symptoms is the secretion of emergency hormones (adrenaline and norepinephrine) by the adrenal medulla. ### Final Answer: The correct answer is **Option 4: Secretion of Emergency Hormones by Adrenal Medulla**. ---
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