Actions of estrogens, Biology

Assignment Help:

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.

Related Discussions:- Actions of estrogens

Locomotion in annelida, Locomotion in Annelida Before we discuss the ...

Locomotion in Annelida Before we discuss the details of locomotion in annelids, we have to recapitulate the major subdivisions of the phylum Annelida. Phylum Annelida contain

Protozoa, way of remember phylum protozoa

way of remember phylum protozoa

Explain threaded implants, Q. Explain threaded implants? Cylindrical no...

Q. Explain threaded implants? Cylindrical non-threaded implants poorly distribute compressive forces and generate shears forces that may fragment and break the bone surrounding

Show the error detection and editing function, Q. Show the Error Detection ...

Q. Show the Error Detection and Editing Function? Error Detection and Editing Function: Consciousness helps us avoid acting solely through habit. It allows us to make novel res

Calcium control of glycogen metabolism, As we have seen, in during epinephr...

As we have seen, in during epinephrine hormonal control or glucagon, dephosphorylated   phosphorylase   kinase   is activated by being phosphorylated by protein kinase. This then a

Genetic defect in pyruvate dehydrogenase, Genetic Defect in Pyruvate Dehydr...

Genetic Defect in Pyruvate Dehydrogenase A defed in any of  the protein subunits of PDH can result in decrease or complete loss of  activity. Severe cases are usually fatal. Sy

Characteristic feature of respiration, Characteristic Feature of Respiratio...

Characteristic Feature of Respiration From our opinion we may say that the characteristic feature of respiration is the intake of oxygen and the output of the carbon dioxide.

Effect of environmental factors-sexual reproduction, Effect of Environmenta...

Effect of Environmental Factors some lower organisms, though the genetic determiners of the sexes are present, the ambient environment plays a decisive role in the development

Excretion, State the excretory organelles of various organisms

State the excretory organelles of various organisms

Obstetric ultrasound , Title Legal aspects in obstetrical ultrasound  ...

Title Legal aspects in obstetrical ultrasound  Introduction Obstetric ultrasound is an essential component of antenatal care and it is widely perceived to be associated

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd