What do u mean by Vitellogenesis?
the process by which the yolk is formed and accumulated in the ovum.
What is Vitellogenesis in birds?
As the cytoplasmic and nuclear changes occur during oogenesis (Chaps. 2 and 3), the oocyte accumulates yolk material; this phase of oogenesis is called vitellogenesis. The yolk deposited in the oocytes of reptiles and birds is required for the development and growth of embryo.
Why is vitellogenesis important?
Vitellogenin is the precursor protein used for production of egg yolk and consists of a relatively large protein chain base as well as lipids, carbohydrates, phosphate groups, and mineral salts. Vitellogenin acts as the carrier molecule for materials for the developing egg.
What changes occure during vitellogenesis?
In insects, it starts when the fat body stimulates the release of juvenile hormones and produces vitellogenin protein. It occurs in all animal groups other than the mammals. In cockroaches, for example, vitellogenesis can be stimulated by injection of juvenile hormone into immature females and mature males.
What is another name for a compendium?
OTHER WORDS FOR compendium 1 survey, digest, conspectus. GOOSES. GEESES.
What are Vitellogenic oocytes?
Vitellogenesis (also known as yolk deposition) is the process of yolk formation via nutrients being deposited in the oocyte, or female germ cell involved in reproduction of lecithotrophic organisms. In insects, it starts when the fat body stimulates the release of juvenile hormones and produces vitellogenin protein.
What are the types of vitellogenesis?
Vitellogenesis is a sequential process incorporating the following events: (1) induction of vitellogenin synthesis and its release into circulation, (2) transport of vitellogenin in the blood stream to the target tissue, (3) uptake of vitellogenin by the growing oocytes, and (4) the conversion of vitellogenin into …
What structure controls Vitellogenesis?
Conclusions. Vitellogenesis is under the control of estrogens and is temporally regulated in the ovary, the upper part of the reproductive tract. Yolk precursors are synthesized by the liver, secreted into the blood stream and incorporated into the forming yolks by receptor-mediated endocytosis.
Which organelle is responsible for Vitellogenesis?
So, the correct answer is ‘Lysosome’.
How do you draft compendium?
When writing a response in your compendium you want to:
- Be specific; do no simply summarize the work.
- Find specific scene, symbols, themes, etc. and analyze them.
- Develop your thoughts thoroughly before writing them out.
What is vitellogenin in insect?
During insect vitellogenesis, the yolk protein precursor vitellogenin (Vg) is mainly synthesized in the fat body, transported by the hemolymph through the intercellular spaces (known as patency) in the follicular epithelium to reach the membrane of maturing oocytes, and sequestered into the maturing oocytes via …
Does vitellogenesis occur in humans?
Vitellogenesis is a process of yolk formation via nutrients and this yolk gets deposited in the oocyte or female germ cell. Chemically yolk is a lipoprotein that is composed of protein, phospholipids and fats with a small amount of glycogen. The yolk is synthesized in the liver of females in soluble form.
What is a synonym of compendium?
abstract, brief, conspectus, digest, epitome, essence, guide, handbook, manual, overview, sketch, summary, survey, syllabus, aperçu, pandect, précis.