NEET Zoology Endocrine Glands MCQ Question
Which of the following statements about endocrine glands and their hormones is correct?
Endocrine glands secrete hormones directly into the bloodstream without ducts.
Thyroid hormones increase blood calcium levels.
The pineal gland regulates sleep cycles by secreting cortisol.
Progesterone supports menstrual cycle irregularities in women.
Correct Answer
Detailed Explanation
Endocrine glands, as described, are ductless and release hormones directly into the blood. The other statements are incorrect; thyroid hormones decrease blood calcium levels, the pineal gland secretes melatonin, and progesterone supports pregnancy, not menstrual irregularities.
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