The hormone that stimulates the contraction of the uterus during childbirth is: MCQ with Answer and Explanation

Explanation:
Lipase is the fat-digesting enzyme, produced mainly by the pancreas (pancreatic lipase) and also by lingual and gastric glands. It hydrolyzes triglycerides into monoglycerides and free fatty acids. Bile salts emulsify fats, increasing surface area for lipase action. Amylase digests starch, pepsin digests proteins, sucrase hydrolyzes sucrose. Lipase requires colipase for optimal activity.

Explanation:
The adult vertebral column consists of 33 vertebrae (though some are fused: 5 sacral and 4 coccygeal). The femur (thigh bone) is the longest and strongest bone. The skull is composed of 22 bones (cranium and facial bones), some fused but the mandible is movable. The rib cage has 12 pairs of ribs. The stapes in the ear is the smallest bone.

Explanation:
After ovulation, the ruptured Graafian follicle transforms into a temporary endocrine structure called the corpus luteum. Its primary function is to secrete large amounts of progesterone (and some estrogen). Progesterone is crucial for maintaining the thickened, highly vascularized uterine endometrium (secretory phase), making it receptive for the implantation of a blastocyst. If fertilization does not occur, the corpus luteum degenerates, progesterone levels drop, and menstruation begins.