This chapter describes normal target tissues including mammary gland, which contain specific receptors for hormones: (1) cytoplasmic proteins for the steroid and (2) cell-surface receptors for polypeptides. These receptor sites are responsible for the initial interaction between the hormone and the ...
The success of your nootropic stack depends on having optimal levels of testosterone and estrogen in your brain. Find out about sex hormones with the Nootropics Expert.
Meristematic cells in plants become the many different types of cells found in a mature plant. This is achieved by a selective response to chemical signals both from neighbouring cells and distant tissues. It is these responses that shape the plant, its time of flowering, the sex of its flowe...
A potential limitation in terms of studied outcomes is that we did not examine estrogen stimulation of reproductive tissues in girls. This is because Andres and Gilchrist et al. have already provided convincing evidence showing no feeding effect in reproductive organ volumes and developmental status ...
(adrenoceptors) on the surface of target organs and tissues. The receptors are known asalpha-adrenergicandbeta-adrenergic receptors,or alpha receptors andbetareceptors, respectively (seehuman nervous system: Anatomy of the human nervous system). In general, activation of alpha-adrenergic receptors ...
After a hormone is discharged by its parent gland into the capillaries or the lymph, it may travel a circuitous path through the bloodstream to exert influence on cells, tissues, and organs (target organs) far removed from its site of origin.One of the best-known endocrine hormones is ...
target THRB (the predominant thyroid hormone receptor isoform in the liver) and/or the liver itself to provide more selective activation of hepatic thyroid hormone-regulated metabolic pathways while reducing thyrotoxic side effects in tissues that predominantly express THRA such as the heart and bone....
with a few exceptions like pituitary growth hormone and insulin, may also be classified as either tropic hormones or target-organ hormones. The former work indirectly through the organs or glands which they stimulate, whereas the latter exert a direct effect on peripheral tissues.SeeEndocrine system...
Secretion, in biology, production and release of a useful substance by a gland or cell; also, the substance produced. In addition to the enzymes and hormones that facilitate and regulate complex biochemical processes, body tissues also secrete a variety
Thyroid hormones (THs) are key hormones that regulate development and metabolism in mammals. In man, the major target tissues for TH action are the brain, liver, muscle, heart, and adipose tissue. Defects in TH synthesis, transport, metabolism, and nuclear action have been associated with genet...