The hormone that increases the heart rate and blood pressure in stress is: MCQ with Answer and Explanation

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.

Explanation:
The Golgi apparatus consists of flat, disc-shaped cisternae and is primarily involved in the packaging, modification, and secretion of materials (proteins and lipids) synthesized in the ER. It has a cis face (forming face) near the ER and a trans face (maturing face) directed towards the plasma membrane.

Explanation:
The Golgi apparatus consists of cisternae that modify, sort, and package proteins and lipids received from the ER for secretion or delivery to other organelles. The smooth endoplasmic reticulum (SER) lacks ribosomes and is the primary site for the synthesis of lipids, including phospholipids and steroids. The rough endoplasmic reticulum (RER) has ribosomes attached and is primarily involved in protein synthesis, not lipid synthesis. Thus, statements 1 and 2 are correct.