Question

Secretion of which hormone is not pituitary dependent
A. Triiodothyronine
B. Testosterone
C. Glucocorticoids
D. Parathyroid hormone

Answer 1

Hint: Pituitary gland is also known as master gland. Prime function of the pituitary is secretion of hormones into the blood. Anterior lobe, posterior lobe and intermediate lobe are the three lobes in pituitary.Through secretion of its hormones, the pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure and many other vital physical functions and processes.

Complete Answer:
Let's analyze the options for a correct answer.
Option A: Thyroid gland secretes Triiodothyronine. It is dependent on pituitary gland. Pituitary secretes thyroid stimulating hormone (TSH) which controls the secretion of thyroid hormones. Therefore, this is the incorrect option.

Option B: Testosterone is secreted from the adrenal cortex of adrenal gland. It is dependent on the pituitary gland because pituitary secretes interstitial cell stimulating hormone (ICSH) in males which helps in the secretion of testosterone. Therefore, this is the incorrect option.

Option C: Adrenal cortex of adrenal gland secretes glucocorticoids. They are pituitary dependent, because pituitary secretes adrenocorticotropic hormones (ACTH) which controls secretion of glucocorticoid hormone. Therefore, this is the incorrect option.

Option D: Parathyroid hormone is secreted by parathyroid gland. Parathyroid hormone helps in maintaining calcium levels in the blood. Parathyroid hormone is independent of the pituitary gland. Therefore, this is the correct option.

Thus, the correct answer is D) Parathyroid hormone.

Note: Anterior pituitary hormones are responsible for secreting hormones such as:
- Human growth hormone
- Thyroid stimulating hormone
- Prolactin
- Luteinising Hormone (LH) and Follicle-Stimulating Hormone (FSH)
- Melanocyte stimulating hormone
- Adrenocorticotropic Hormone (ACTH)

Posterior pituitary secretes hormones such as:

1. Antidiuretic hormone (ADH)
2. Oxytocin