Oogenesis and Ovarian Cycle
Oogenesis and Ovarian Cycle Quiz
Test your knowledge of oogenesis and the ovarian cycle with this comprehensive quiz. Delve into the intricacies of female reproductive biology and see how well you understand the various stages and fun
Whether you're a student of biology, a teacher, or just someone interested in the subject, this quiz is a great way to assess your understanding. Topics covered include:
- Meiosis and follicular development
- Hormonal regulation
- Follicular atresia
- Ovulation and corpus luteum
In human females, which meiotic phase has the longest duration?
Anaphase-1
Prophase-2
Prophase-1
Metaphase-2
What is not seen in primary follicle?
Granulosa cells are cuboidal in nature
A glycoprotein layer 'Zona pellucida' appears between primary oocyte and granulose cells
Granulose cells express FSH receptors
Granulose cells nourish the oocyte by way of cytoplasmic extensions
How many ova are produced from a single oogonium?
1
400
2
4
Primordial germ cells in a female are derived from:
Ovarian cortex
Germinal epithelium of ovary
Yolk sac
None of the above
Which is a function of ovary?
Oogenesis
Ovulation
Secretion of female sex hormones
All of the above
OMIF (Oocyte Maturation Inhibiting Factor) begins to be released by:
Granulosa cells
Theca cells
Cumulus cells
Pregranulosa cells
What is not true about granulosa cells?
Secrete oestrogen
Have high aromatase activity
Secrete androgens
Secrete inhibin
What is must for the growth of follicle till primary follicle stage?
GnRH
FSH
Local factors from oocyte
Oestrogen
All are the features of secondary follicle except:
Granulosa cells multiply forming several layers
Small pockets of fluid develop between the granulosa cells
Granulosa cells express FSH receptors under the influence of activins
Theca layer gets differentiated into theca interna and externa
Which of the following statements is INCORRECT?
Granulosa cells are avascular in the follicular phase
Theca cells are avascular in the follicular phase
Theca cells are vascular in the follicular phase
Granulosa cells are vascular in the luteal phase
Main cause of atresia of follicles other than the dominant follicle in the late follicular phase is:
Decreased levels of FSH due to negative feedback to anterior pituitary
Increased levels of FSH due to positive feedback to anterior pituitary
Decreased levels of inhibin
Decreased levels of oestrogen
LH surge is seen because of:
Negative feedback due to increased amount of oestrogen
Positive feedback due to increased amount of oestrogen from tertiary follicles
Positive feedback due to increased levels of oestrogen from the dominant follicle
None of the above
Levels of oestrogen required to lead to positive feedback are:
200 ng /ml for 48 hours
200 pg/ml for 36 hours
200 mg/ml for 48 hours
400 pg/ml for 36 hours
What is required just before ovulation?
Tremendous rise in the levels of LH
Tremendous rise in the levels of FSH
Increased levels of oestrogen
Increased levels of inhibin
All are true about stigma in the ovary except:
A protrusion of ovarian wall seen throughout the ovarian cycle
A poorly vascularised area in the ovarian wall due to compression by the dominant follicle
A site for release of ovum
It requires progesterone for its degeneration in order to release the ovum
What is NOT true about luteal phase?
Refers to 15 to 28 days in a 28 day cycle
Progesterone is the dominant hormone
Granulosa and theca cells transform into lutein cells
Increased levels of FSH and LH are seen during the early luteal phase
Which of the following statements about corpus luteum is INCORRECT?
Basal levels of LH are required for its function
Secretes hormones- oestrogen, progesterone, and inhibin
Regression of corpus luteum starts with the onset of pregnancy
Forms around 7-8 days of ovulation
Which of the following is NOT TRUE about selection of dominant follicle?
Dominant follicle having maximum number of FSH receptors is selected
Number of FSH receptors per granulosa cell are more
Number of granulosa cells are more, thus, receptors are more
Maximum secretion of oestrogen by the dominant follicle
Involution of corpus luteum occurs due to:
Increased release of FSH and LH from anterior pituitary
Decreased release of progesterone from corpus luteum
Decrease levels of inhibin from the corpus luteum
Decreased release of FSH and LH from anterior pituitary
A student performs better if he/she-
Reads more thoroughly and regularly
Pays attention in the class
Does not try to cheat in Online tests
All of the above
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