Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
1.Which of the following(s) would result in a phenotypical male?
A. XO B. XXY C. XX with a piece of Y D. XYY E. XX |
B. XXY
C. XX with a piece of Y D. XYY |
|
|
2. Which is true in sex determination
A. the SRY gene in the X chromosome regulates testes formation B. SRY may code for a RNA binding protein that switches off mRNA that would otherwise induce teste formation C. SRY counters the DSS gene to induce testes formation D. XXY individuals have no testes because there are two DSS vs. one SRY E. Activation of DSS results in activation of TFG |
C. SRY counters the DSS gene to induce testes formation
|
|
|
3. Which is true of gonads
A. hormones do not influence which type of gonad develops in an individual B. germ and gonadal cells can be different sex C. the default gonad is male D. the role of the X chromosome is to determine whether or not the fetus will be female or male E. injection of male hormones will result in testes formation |
A. hormones do not influence which type of gonad develops in an individual
|
|
|
4. Which is true of development
A. development of genitalia occurs from one of five sets of primordial tissue B. mullerian ducts form the epididymis, vas deferens, and accessory glands C. wolffian ducts form the oviducts, uterus, cervix, and vagina D. testes produce a factor that degenerates the mullerian ducts E. DHT is necessary, from MIF, induces maturation of external genitalia |
D. testes produce a factor that degenerates the mullerian ducts
|
|
|
5. What is the purpose of testosterone?
|
Maturation of sperm tubules, development of Wolffian ducts, and external male genitalia.
|
|
|
6. Which is true of androgen formation in the body
A. males have more aromatase which results in increased testosterone B. females have greater 3BHSD which results in increased estrogen C. Tfm can result in phenotypic females D. Estrogen is not essential for males, as it is a female hormone E. Testosterone virilizes the mullerian ducts |
C. Tfm can result in phenotypic females
|
|
|
7. What is the aromatization hypothesis?
|
Conversion of testosterone to estradiol by aromatize enzyme in the brain may have an important role in stimulating male behavior.
|
|
|
8. What is the protection hypothesis that is a corollary to the aromatization hypothesis?
|
Female fetuses have alpha-fetoprotein to bind estradiol, which allows them to continue develop as females. This protein does NOT bind testosterone, so in males, testosterone is free to enter the brain to get converted to estradiol
|
|
|
9. Which is true relating hormones and behavior
A. there is a strong correlation between testosterone levels and aggressive behavior B. XXY have passive behavior C. Testosterone levels in XYY and XY are dramatically different D. PMS are caused by estrogen imbalance E. Hormones alone establish sex behavioral pattens of individuals |
B. XXY have passive behavior
|
|
|
10. Which is true of estradiol and inhibin production by cells
A. androgens cross the basement membrane for further conversions in granulose cells B. inhibin is synthesized by theca cells and released into the blood C. progesterone is only synthesized by theca cells D. aromatase is in both theca and granulose cells E. inhibin will increase the production of estrogens |
A. androgens cross the basement membrane for further conversions in granulose cells
|
|
|
11. What is the deterministic model?
|
That only a single follicle that beings to grow within a group has the potential to develop into an ovulatory follicle.
|
|
|
12. What is the probabilistic model?
|
All follicles in a group that matures has equal chance, but eventually one is singled out and chosen to become an ovulatory follicle.
|
|
|
13. What is the “dominant” model?
|
Where an ovulatory follicle will recruit others, kill them through atresia, and then dominate over the others to become an ovulatory follicle.
|
|
|
14. What is the path of sperm in the male gonads?
|
SEVEN-UP
|
|
|
15. Which is true of regulation in the male gonads?
A. Sertoli cells synthesize testosterone B. Leydig cells secrete inhibin C. Sertoli cells lie outside the seminiferous tubule D. Leydig cells nurture the sperm to maturation E. Testosterone is converted into estradiol in Sertoli cells |
E. Testosterone is converted into estradiol in Sertoli cells
|
