PHYSIOLOGY REPRODUCTION. Oogenesis: Egg Cell Formation Oogonia mitosis ceases before birth At birth:...
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Transcript of PHYSIOLOGY REPRODUCTION. Oogenesis: Egg Cell Formation Oogonia mitosis ceases before birth At birth:...
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PHYSIOLOGY
REPRODUCTION
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Oogenesis: Egg Cell Formation
Oogonia mitosis ceases before birth
At birth: only primary oocytes – suspended in prophase of meiosis I (= prophase I)
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ovulation
Oogenesis after Birth:
At puberty: ↑ estrogen initiates ovarian cycle
2nd meiotic division completed after fertilization
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Growth and Aging
• Puberty ( GnRH)– in girls = menarche
• Average 12 y
– In boys, later (harder to pinpoint a time)
• Menopause– Irregular menstrual periods and cessation
• Andropause– Similar drop in androgens
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The ampulla, fimbriae, and infundibulum are anatomical features of the
A. Uterus
B. Cervix
C. Vagina
D. Fallopian tubes
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Spermatogenesis
• Seminiferous tubules
• Sertoli cells: androgen binding protein blood testes barrier etc.
• Leydig cells testosterone vs. DHT
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On average the process of ovulation occurs every
A. 2-3 days
B. 14-15 days
C. 28-30 days
D. 8-9 months
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Development of the embryo takes place in the tissue layer of the uterus known as the
A. Perimetrium
B. Endometrium
C. Myometrium
D. Neurometrium
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The corpus luteum forms from the
A. Residual cells of the follicle
B. Ectoderm and endoderm cells
C. Ciliated cells of the Fallopian tube
D. Greater vestibular gland
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During days 15-28 of the menstrual cycle
A. The level of progesterone is lowest
B. The uterine lining is removed from the body
C. Ovulation takes place
D. The corpus luteum secretes progesterone
E. The corpus luteum secretes estrogen
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`
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Biosynthetic Pathway for Steroid Hormones
Theca cellsSynthesize androgens
Granulosa cellsconvert androgens to
estrogen
diffusion
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The epithelium cells that produce sperm cells are located in the testes within the
A. Seminiferous tubules
B. Vas deferens
C. Corpus spongiosum
D. Ampulla
E. Prostate Gland
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The chromosomes of a sperm cell are contained
A. Within the flagellum
B. Packed in the head of the cell
C. Within the acrosome of the cell
D. In the neck of the sperm cell
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Secretions of the seminal vesicle
A. Are alkaline
B. Pass into the testes
C. Are acidic
D. Contain sperm cells
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The general term given to male sex hormones is
A. Estrogen
B. Thymosins
C. Androgens
D. Prostaglandins
E. Testosterones
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Which of the following hormones controls the release of anterior pituitary gonadotropins?
A. LH
B. GnRH
C. FSH
D. Testosterone
E. CRH