The technique used to measure the concentration of a solution based on light absorption is: MCQ with Answer and Explanation

Explanation:
Lymph is the fluid within lymphatic vessels, derived from interstitial fluid that has entered lymph capillaries. It contains white blood cells, especially lymphocytes, and transports fats (as chyle) from the intestine. Plasma is blood fluid, serum is plasma without clotting factors, tissue fluid is interstitial.

Explanation:
The pituitary, located at the base of the brain, controls many endocrine glands via its hormones, earning the name 'master gland'. Insulin is from pancreas; it is connected to hypothalamus by infundibulum.

Explanation:
Oxytocin, produced in the hypothalamus and released from the posterior pituitary, triggers the milk let-down reflex by causing myoepithelial cells around alveoli to contract upon suckling. Prolactin stimulates milk synthesis. Estrogen and progesterone are involved in breast development during pregnancy but not the immediate ejection reflex.