From The Textbook Flashcards
(34 cards)
How many oogonia by 20 weeks?
7 million
How many oocytes at birth and at puberty?
1 million at birth
0.4 million at puberty
What is the chromosome number in gametes?
23, half of that in other cells
What stage is the primary oocyte suspended in?
Prophase
When does the second meiotic division occur?
When the ovum enters the Fallopian tube.
What are thecal cells?
Stromal cells aggregated around the follicles
What forms the corona radiata?
The innermost layers of granulosa cells
When is the corpus luteum formed
After ovulation
What stimulates follicular growth
FSH
What stimulates LH receptor development
FSH
Where is oestrogen produced?
The follicles of the ovary
What does the corpus luteum produce?
Oestrogen and progesterone
What occurs during the menstrual phase of the endometrial cycle
The functional layer of the endometrium is shed
When is the repair phase?
Day 4-7
Describe the follicular phase
Maximum period of growth of endometrial glands (due to oestrogen)
Features of the luteal phase
Saw-toothed glands, pseudodecidual reaction in stroma.
How long does full maturation of sperm take?
64-70 days
What do mature sperm develop from?
Haploid spermatids
What is the head of a sperm covered by?
The acrosomal cap
What does the body of the sperm contain?
Helix of mitochondria
What dos the tail of the sperm consist of?
2 longitudinal fibres and nine pairs of fibres
Where does seminal plasma originate?
Prostate, seminal vesicles, bulbourethral glands
Why does the semen contain a high concentration of fructose?
To provide energy for sperm motility
Why does semen contain high concentration of prostaglandins?
Potent stimulatory effect on uterine musculature
