Actions of estrogens, Biology

Actions of Estrogens

  1. The most general effect of the estrogens is to promote tissue growth. It is more pronounced in the accessory sex tissues. Estrogens stimulate cell division in the ' deeper parts of the skin and causes a more rapid replacement of the outer cornified layers of the skin. There is some evidence that high levels of estrogens (under pathological conditions) may be potentially dangerous as they may encourage the formation of cancer in certain individuals.
  2. Estrogens are required for the maintenance of vaginal lining and uterine growth. It has been observed that in the experimental animals deprived of estrogens, the vaginal lining and the uterine wall become thin, and mitotic divisions seldom occur in these tissues. Administration of estrogens to the estrogen-deprived animals causes rapid growth of the vaginal and the uterine tissue. The metabolic activity of these tissues also increases as evidenced by augmented uptake of water and electrolytes by the tissues and rise in the RNA content of the tissue.
  3. Estrogens are essential for the anatomic preparation of the mammary glands for milk secretion. In some species it affects mammary development in combination with progesterone. But in some species, estrogens alone or progesterone alone produce the effect. As a general rule, the mammary glands require pre-treatment with estrogens before the progestogens are effective.
  4. In mammals sexual receptivity or heat coincides with a period during which the ovaries are secreting large amounts of estrogens. Full mating behaviour generally depends upon both estrogen and progesterone. These ovarian hormones probably act through the central nervous system (hypothalamus) to condition the psychic manifestations such as increased spontaneous activity, lordosis, sexual receptivity etc.
Posted Date: 1/16/2013 7:05:11 AM | Location : United States







Related Discussions:- Actions of estrogens, Assignment Help, Ask Question on Actions of estrogens, Get Answer, Expert's Help, Actions of estrogens Discussions

Write discussion on Actions of estrogens
Your posts are moderated
Related Questions
Gregor Mendel's Law of Independent Segregation referred to which of the following genetic elements? A. Alleles of two genes that reside on the similar chromosome B. Alleles


Q. Mammal identity card. How are mammals characterized according to examples of representing beings, skin, respiration, nitrogen waste, basic morphology, circulation, thermal contr

Q. Use of Aldehydes as chemical sterilant? Formaldehyde: widely employed for the fumigation of operation theatres. Glutaraldehyde: commercial preparations are active at


Features of Amphibian Gastrulation Major features of amphibian gastrulation are: Ectoderm surrounds the embryo by Epiboly. Gastrulation is initiated by a limited i

Q. Nature of disease? Education is very important for diabetics because it is a lifelong disorder. In order to enable the patient to lead a healthy and a good quality Life free

LIF E AS AN EXPRESSION OF ENERGY CHANGES - Energy is explained as capacity of body to do work. Energy may be as potential (stored) or kinetic (expended) energy. It ex

What are the four groups of protozoans? The four major groups of protozoans are the sarcodines (that form pseudopods, like amoebae), the mastigophores (flagellated, such as the

Define Future challenges for scaling from individual to ecosystems? Scaling of biogeochemical fluxes in terrestrial systems has confirmed much harder. While ecosystem ecologist