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

Blood and its composition, BLOOD - Blood is a mobile connective tiss...

BLOOD - Blood is a mobile connective tissue composed of a fluid, the plasma and the cells, the blood corpuscles. Blood is basis of life. Blood is the softest tissues

What is the normal duration of the menstrual cycle, Q. What is the normal d...

Q. What is the normal duration of the menstrual cycle? How does the calendar contraceptive method work? The normal duration of the menstrual cycle is 28 days but it can vary am

Indian tick typhus, Indian tick typhus Indian tick typhus (Mediterrane...

Indian tick typhus Indian tick typhus (Mediterranean spotted fever) is a tick-borne rickettsial infection caused by Rickettsia conori and is characterized by fever and a chara

Indirect uses of biodiversity, The cost of replacing these indirect uses of...

The cost of replacing these indirect uses of biodiversity, even if it were technically possible, would be so high as to render it impossible to duplicate. We also do not know how

Define antioxidant action of polyphenols, Define Antioxidant Action of Poly...

Define Antioxidant Action of Polyphenols? The properties of Polyphenols due to which they have been identified to act as antioxidant is because they: - act as termi

Ideal eia and measures and benefits of eia, An ideal EIA system would: ...

An ideal EIA system would: (i)     Apply to all projects that are expected to have significant environmental effects and address all impacts that are expected to occur due to t

Explain about the lignans, Explain about the Lignans? Lignans are diphe...

Explain about the Lignans? Lignans are diphenolic compounds formed by dilnerization of 2 cinnamic acid residues. Most lignans apparently pass through the GIT as fibre. Some lig

Treatment of diarrhoea, Treatment   Most cases of diarrhoea do not need...

Treatment   Most cases of diarrhoea do not need antibiotic therapy as the bacterial or parasitic organism are not isolated from most of the cases. However chemotherapeutics  ar

Which part of heart serves as an effector, Which of the following serves as...

Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Nicotinic Acetylcholine Receptors (nAChR) in SA node c

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