The openings on the leaf surface for gas exchange are called: MCQ with Answer and Explanation

Explanation:
The liver continuously synthesizes bile, which is essential for fat emulsification. The pancreas acts as both an exocrine and endocrine gland; its Islets of Langerhans produce insulin and glucagon. The gall bladder only stores, concentrates, and releases bile; it does not produce any digestive enzymes. Thus, statements 1 and 2 are correct.

Explanation:
Oxytocin, released from the posterior pituitary, causes contraction of myoepithelial cells in mammary alveoli, forcing milk into ducts (let-down reflex). Prolactin stimulates milk synthesis.

Explanation:
Oxytocin, released from the posterior pituitary, increases the frequency and strength of uterine contractions during labor via positive feedback. Prolactin stimulates milk production, estrogen helps uterine growth, relaxin relaxes pelvic ligaments.