Term
| what to sections morph to form the anterior and posterior lobes of the pituitary gland? |
|
Definition
posterior lobe- infundibulum
anterior lobe- Rathke's pouch |
|
|
Term
| what is the sphenoid bone? |
|
Definition
| develops around pituitary gland to protect it |
|
|
Term
| what is the sella turnica |
|
Definition
| the protective cavity that houses the pituitary gland |
|
|
Term
| at what time do germ cells start migrating |
|
Definition
| week 4 of gestation in cows and humans |
|
|
Term
| what happens when the primordial germ cells migrate to the gonadal ridge? |
|
Definition
| the form the primitive sex cords |
|
|
Term
| sections of fetal kidneys and fuction |
|
Definition
pronephros- regresses
mesonephros- forms repro tract
metenephros- forms adult kindneys and ducts |
|
|
Term
| what 2 parts did the Jost Experiment look at |
|
Definition
Mullarian Ducts
Wolffian ducts |
|
|
Term
| what part of the germ cells for the fetus? the placenta? |
|
Definition
The ICM forms the fetus
the blastocoele forms the placenta |
|
|
Term
| what is the jost paradigm |
|
Definition
| chromosomal sex--gonadal sex--hormonal sex--phenotypic sex--behavioral sex |
|
|
Term
| what gene controls for sexual differentiation? |
|
Definition
| SRY gene on the Y chromosome (short arm) |
|
|
Term
| what is the function of the SRY gene? |
|
Definition
| transcription factor for primary sex chords, and Sertoli cells |
|
|
Term
| What important hormone do the Sertoli cells produce? What is the function of this hormone? |
|
Definition
| Anti-Mullarian hormone that causes Ledig cells to differentiate and produce testosterone |
|
|
Term
| What if there is no SRY gene present |
|
Definition
| the Wolffian ducts regress and Mullarian ducts begin to fuse and form cervix, uterus, and horns |
|
|
Term
| what product do the accessory sex glands produce that convert testosterone? |
|
Definition
|
|
Term
| what does 5a-reductase do? |
|
Definition
| testosterone--> dihydrotestosterone (DHT) |
|
|
Term
| what hormones causes differentiation in sex in the brain? |
|
Definition
| testosterone is aromatized into estradiol, which can pass through the blood brain barrier and program male behavior |
|
|
Term
|
Definition
| compounds that make plastic flexible, but ingestion interferes with testosterone and estrogen |
|
|
Term
| what prevents estrogen produced in ovaries from entering the brain and programming male behavior |
|
Definition
| alpha Fetal protein (aFP) binds to estrogen and prevents it from passing the barrier |
|
|
Term
|
Definition
| germ cells fail to multiply and die. sertoli cells only in semineferous tubules |
|
|
Term
| what is an inguinal hernia> |
|
Definition
| when a part of the intestine gets past the inguinal loop and into the scrotum |
|
|
Term
|
Definition
sharing of blood and placenta with a male and female twin pair
get SRY gene in both |
|
|
Term
| what causes the testes to descend? |
|
Definition
| rapid growth then regression of the gubernaculum |
|
|
Term
| what hormones are required to tell the gubernaculum to grow? |
|
Definition
| testosterone and Insl-3 (insulin like 3) |
|
|
Term
| what is the location of the repro tract? |
|
Definition
| retroperitoneal (behind the peritoneum) |
|
|
Term
| what is a benefit of having a freemartin? |
|
Definition
| They are good at detecting estrus without risk of pregnancy |
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