Search results
Results from the WOW.Com Content Network
[2] [3] Nearly every species of mammal has teats; except for monotremes, egg-laying mammals, which instead release milk through ducts in the abdomen. In only a handful of species of mammals, certain bat species, is milk production a normal male function. Galactopoiesis is the maintenance of milk production. This stage requires prolactin.
Prolactin (PRL), also known as lactotropin and mammotropin, is a protein best known for its role in enabling mammals to produce milk. It is influential in over 300 separate processes in various vertebrates, including humans. [5] Prolactin is secreted from the pituitary gland in response to eating, mating, estrogen treatment, ovulation and ...
A mammary gland is an exocrine gland in humans and other mammals that produces milk to feed young offspring.Mammals get their name from the Latin word mamma, "breast".The mammary glands are arranged in organs such as the breasts in primates (for example, humans and chimpanzees), the udder in ruminants (for example, cows, goats, sheep, and deer), and the dugs of other animals (for example, dogs ...
Transcription-translation feedback loop (TTFL) is a cellular model for explaining circadian rhythms in behavior and physiology. Widely conserved across species, the TTFL is auto-regulatory, in which transcription of clock genes is regulated by their own protein products.
Mammals are a class of vertebrates that contain mammary glands which secrete milk that nourishes their offspring. This maternal behavior is unique from all other vertebrate classes. The basic maternal care patterns in mammals involve the internal incubation during gestation, the delivery of young, and maternal care until the young are weaned. [5]
A prolactin cell (also known as a lactotropic cell, epsilon acidophil, lactotrope, lactotroph, mammatroph, mammotroph) is a cell in the anterior pituitary which produces prolactin (a peptide hormone) in response to hormonal signals including dopamine (which is inhibitory), thyrotropin-releasing hormone and estrogen (especially during pregnancy), which are stimulatory.
Once the chemicals are accumulated in the body tissues of the mammals, a portion of these chemicals in the female mammals are transferred to their offspring during gestation and lactation. The degree of maternal-fetal transfer of chemical pollutants is affected by chemical and physical properties of those compounds.
In mammals, this process is driven by the suprachiasmatic nuclei (SCN) in the hypothalamus, composed of the two negative feedback loops Per-Cry and Clock-Bmal. Transcription of the period ( Per ) and cryptochrome ( Cry ) genes cannot proceed until CLOCK and BMAL1 have dimerized and bound to the E-box element , a process initiated by CREB ...