The hormone that regulates the body's response to long-term stress is: MCQ with Answer and Explanation

Explanation:
Veins have thinner walls than arteries and contain valves. The pulmonary artery carries deoxygenated blood, and arteries normally (except pulmonary) carry oxygenated blood.

Explanation:
Neurotensin is a 13-amino acid peptide that functions as both a neuromodulator in the central nervous system and a hormone in the gastrointestinal tract. In the gut, it is secreted by the N cells in the ileum in response to fat ingestion. Its primary gastrointestinal functions are to inhibit gastric motility and gastric acid secretion (contributing to the 'ileal brake'), and to stimulate the release of histamine from mast cells and glucagon from the pancreas. It also causes vasodilation in the intestinal mucosa.

Explanation:
Somatostatin, also known as growth hormone-inhibiting hormone (GHIH), is a peptide hormone produced by the delta cells of the pancreatic islets, the hypothalamus, and various cells in the gastrointestinal tract. It acts as a powerful, universal inhibitor. It inhibits the release of growth hormone (GH) and thyroid-stimulating hormone (TSH) from the anterior pituitary. In the pancreas, it inhibits the secretion of both insulin and glucagon. In the gut, it inhibits the release of gastrin, secretin, and other GI hormones, slowing down digestion and absorption.