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

Define the enzyme function of vitamin c, Define the Enzyme Function of Vita...

Define the Enzyme Function of Vitamin C? Vitamin C acts as an electron donor for 11 enzymes. Three of those enzymes are found in fungi but not in humans. Of the eight remainin

What is the life duration of the red blood cells, Q. On average what is the...

Q. On average what is the life duration of the red blood cells? Where are they destroyed? What is the destination of the heme groups after the destruction of hemoglobin molecules?

Illustrate adaptation to terrestrial life, Q. Why can the allantois be cons...

Q. Why can the allantois be considered an adaptation to terrestrial life? The allantois is an adaptation to dry land because in embryos of oviparous terrestrial beings like bir

State the term - neuropsychological examination, State the term - Neuropsyc...

State the term - Neuropsychological Examination For a neuropsychological examination a battery of tests administered should include, at a minimum: Intelligence Tests

Define gray matter and white matter of the spinal cord, Q. What are the res...

Q. What are the respective constituents of the gray matter and of the white matter of the spinal cord? The gray matter or gray substance of the spinal cord contains predominant

Introduction to cleavage, INTRODUCTIO N - Karl Von Baer - Coined th...

INTRODUCTIO N - Karl Von Baer - Coined the term cleavage. Swammerdom - First time seen cleavage. Prevost and Dumas - Reported cleavage of frog's egg. Spllanzani - Detail

What is signifying by suction force of the plant cell, Q. What is signifyin...

Q. What is signifying by suction force of the plant cell? Does the suction force facilitate or make difficult the entry of water into the cell? The suction force (SF) is the os

What is the mendel observations and conclusions, How would Mendel's observa...

How would Mendel's observations and conclusions have been dissimilar if many of the characteristics he studied, such as seed color and seed texture, had been controlled by genes lo

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