This category focuses on the endocrine system’s control center—the hypothalamus and pituitary gland—and their role in coordinating hormone release. It includes questions on hormone pathways, feedback loops, and glandular interactions.
Somatostatin, secreted by the hypothalamus, inhibits the release of growth hormone from the pituitary gland.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
Glucocorticoids like cortisol are secreted by the adrenal cortex and regulate metabolism and stress response.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
The posterior pituitary stores and releases oxytocin and ADH, but these hormones are produced by the hypothalamus.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
Thyrotropin-releasing hormone (TRH) from the hypothalamus stimulates the anterior pituitary to release thyroid-stimulating hormone (TSH).
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
ADH (Vasopressin), secreted by the posterior pituitary, promotes water reabsorption in the kidneys to prevent dehydration.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
Vasopressin (ADH) promotes water reabsorption in the kidneys, reducing water loss in urine.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
Aldosterone, secreted by the adrenal cortex, promotes sodium and water retention to maintain blood pressure.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
Adrenaline, secreted by the adrenal medulla, increases heart rate and blood pressure as part of the "fight-or-flight" response.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
GnRH from the hypothalamus stimulates the anterior pituitary to release LH and FSH.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
The posterior pituitary does not synthesize hormones but stores and releases oxytocin and ADH, which are produced by the hypothalamus.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
ADH (Vasopressin), secreted by the posterior pituitary, promotes water reabsorption in the kidneys to regulate water balance.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
GnRH, secreted by the hypothalamus, regulates the release of LH and FSH from the anterior pituitary.
Ref: NCERT Class 11 Biology Chapter 19: Chemical Coordination and Integration Endocrine System and Hypothalamus Pituitary Axis
