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Dictionary » F » Follicle

Follicle

Follicle

1. (Science: anatomy) Generally a small sac or vesicle.

2. (Science: botany) a kind of fruit formed from a single carpel, that splits to release its seeds.

3. (Science: dermatology) a hair follicle, an invagination of the epidermis into the dermis surrounding the hair root.

4. (Science: gynaecology, physiology) An ovarian follicle, an oocyte surrounded by one or more layers of granulosa cells. As the ovarian follicle develops a cavity forms and it is then termed a graafian follicle. Any small spherical group of cells containing a cavity.A small sac-like cavity.


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Human Reproduction System

FSH stimulates the development of follicles while LH stimulates the remaining follicle to develop into the corpus luteum and also for ovulation to occur. The negative feedback mechanism whereby the secretion of FSH and LH is halted occurs ...

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by mande
Wed Aug 26, 2009 10:15 am
 
Forum: Human Biology
Topic: Human Reproduction System
Replies: 1
Views: 120

T cell differentiation

... it differentiates into Th and Tc. Tc go off to the inflamed tissue and Th cells diferentiate into Th1 and Th2 and the Th2 migrate to the B cell follicle to activate B cells, while other Th2 and Th1 cells go to the tissuses. However I think it might be that the Th cells migrate to the extralymphoid ...

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by Immunologyordie
Mon Apr 13, 2009 5:25 pm
 
Forum: Human Biology
Topic: T cell differentiation
Replies: 12
Views: 2303

Re: What kills (and what saves) a corpus luteum?

It looks like the time bomb is a positive feedback loop between oxytocin and prostaglandin F2 (PGF2), initiated in the preovulatory follicle. PGF2... * causes degeneration of the capillary network supplying the corpus luteum, and * stimulates endothelial cells to produce endothelin-1, which ...

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by jasonfahy
Mon May 05, 2008 4:58 pm
 
Forum: Human Biology
Topic: What kills (and what saves) a corpus luteum?
Replies: 3
Views: 1671

Reproductive Modes

... Estrogen and progesterone together ____. a). inhibit pituitary hormones b). stimulate the development of the endometrium c). are produced by the follicle and corpus leteum d). all of the above are correct I said D 5). Why are embryonic stem cells thought to have a greater potential in medical ...

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by A5HLEY
Thu Apr 17, 2008 10:32 pm
 
Forum: Physiology
Topic: Reproductive Modes
Replies: 3
Views: 1443

follicle doubt..

hey guys we knw tht when egg is not fertilized thn endometrium breaks thn formation of graffian follicle takes place and endometrium is repared so tell me if this graffian follicle is also not fertilized thn d endometrium will again break so is it like tht or i m wrong?

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by sonawanes61
Sat Mar 15, 2008 9:09 am
 
Forum: Physiology
Topic: follicle doubt..
Replies: 0
Views: 1075
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