The plant cell wall is mainly composed of: MCQ with Answer and Explanation

Explanation:
The hypothalamus is a small region in the forebrain that maintains homeostasis by regulating body temperature, hunger, thirst, sleep, and emotions. It also controls pituitary gland secretions. The cerebellum coordinates movement, medulla controls respiration and heart rate, pons relays signals. Hypothalamus acts as the body's thermostat and the link between nervous and endocrine systems.

Explanation:
Thyroid-stimulating hormone (TSH) from the anterior pituitary binds to receptors on thyroid follicular cells, stimulating synthesis and release of thyroid hormones (T₃ and T₄). ACTH targets adrenal cortex.

Explanation:
Renin is released by juxtaglomerular cells of the kidney when blood pressure drops. It starts the renin-angiotensin-aldosterone system. Note: rennin (chymosin) is in the stomach for milk digestion.