Question

If both the ovaries are removed from the rat then which hormone is decreased in blood?
A. Oxytocin
B. Estrogen
C. Prolactin
D. Gonadotropin

Answer 1

The rat's ovaries are found near the kidneys at the distal end of the uterine horns. The oviducts tie the ovaries to each of the uterus' horns. The ovaries create the ova, also referred to as the nucleus, and some hormones.

Complete Answer:
- The organs of the female reproductive system are specialised in the production of ova (eggs), the transport of egg cells to the fertilisation site, the provision of a suitable environment for the growth of embryos and, at the appropriate time, the transfer of offspring outside the body (birth).
- After birth, the reproductive system also provides food for the offspring and produces female sex hormones.
- The vagina, ovaries, uterus, and mammary glands are the major structures of the system of the female rat. The ovaries preserve the female reproductive system's fitness. Two primary hormones-estrogen and progesterone-are secreted.
- In the puberty of females, oestrogen is responsible for the emergence of secondary sexual characteristics and the maturation and maintenance of reproductive organs in their mature functional state.
- While progesterone prepares the uterus for pregnancy, lactation prepares the mammary glands. Since the ovaries secrete oestrogen, the oestrogen hormone in the blood decreases when the ovaries are withdrawn.
- The neuropeptide produced by the posterior pituitary is oxytocin. Prolactin is predominantly used for milk processing. The anterior pituitary secretes GnRH and it activates LH and FSH secretion.

The correct Answer is option (B) Estrogen.

Note: The rat's paired ovaries are grape-like structures which differ in gross appearance and size,Depending on the oestrous cycle process.Preputial glands in the female rat are exocrine glands that are located near the pheromone-producing clitoris.
Any chemical created by a living organism that transmits a message to other members of the same species is a pheromone. Attracting the male to the female preputial glands produced by these pheromones is beneficial.