NEET 2019 · Class 11

Chemical Coordination and Integration

Artificial light, extended work-time and reduced sleep-time disrupt the activity of –

  1. (A)Posterior pituitary gland
  2. (B)Thymus gland
  3. (C)Pineal gland
  4. (D)Adrenal gland

The NCERT line that answers it

Verbatim line

Pineal gland secretes melatonin, which plays a very important role in the regulation of 24-hour (diurnal) rhythms of our body (e.g., rhythms of sleep and state of being awake, body temperature, etc.).

Chapter
Chemical Coordination and Integration
Section
intro Column II
Page
11
Words matched
32 of 32

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=0.7904, combined=0.8743). Verified: high — The span explicitly states that the pineal gland secretes melatonin, which regulates 24-hour diurnal rhythms including sleep and wakefulness, directly linking artificial light, extended work-time, and reduced sleep-time to disruption of pineal gland activity.

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