Reproductive System – Questions and Answers
1. HORMONE SECRETED BY THE GROWING FOLLICLE AND IDENTIFY THE ACTION OF THIS
HORMONE ON THE UTERUS
Estrogen. Promotes ovulation.
2. FUNCTION OF LH AND THE GLAND THAT PRODUCES THIS HORMONE
Stimulates the follicular tissues to transform into corpus luteum. Pituitary gland.
3. SIGNIFICANT PROBLEMS FACED BY BONY FISHES PRACTICING EXTERNAL FERTILIZATION
The eggs and sperms might be triggered by the water temperature or the length of daylight.
4. EFFECT OF HIGH ESTROGEN AND PROGESTERONE ON THE ENDOMETRIUM WALL
Oestrogen builds up the endometrium lining while progesterone maintains the growth.
5. HOW THE HYPOTHALAMUS AND OVARIES WORK TOWARDS THE OVULATION PROCESS
The hypothalamus releases GnRH to lead to the secretion of FSH and LH from the anterior
pituitary. FSH stimulates follicle growth aided by LH.
6. HOW OVARIES INFLUENCE MENOPAUSE IN WOMEN
The ovaries stop making the hormones estrogen and progesterone. The ovaries also stop
releasing eggs.
7. DISADVANTAGE OF EXTERNAL FERTILIZATION
Can be triggered by temperature. Require a suitable environment. Low survival rate of the
gametes.
8. STRATEGIES OF EMBRYONIC DEVELOPMENT
Oviparity, ovoviviparity and viviparity
9. DESCRIBE SPERMATOGENESIS
Formation and development of sperm. Begins during puberty and continues throughout
one’s lifetime. Within the testes, sperm form in seminiferous tubules. Starts from the
outermost part of the seminiferous tubules inwards to the lumen of the seminiferous
tubules.
10. STATE AND EXPLAIN THE TYPE OF ASEXUAL REPRODUCTION INVOLVED IN BEE COLONIES
Parthenogenesis. Without sperm, the eggs develop parthenogenetically into haploid male
drones. A queen bee mate only once and stores the sperm and is in control of the release of
sperm. Fertilized eggs can be developed into other queens or sterile worker bees that are
female.
11. WHAT HAPPENS TO THE LEVELS OF FSH AND LH IF BOTH OVARIES ARE REMOVED?
FSH and LH raised rapidly in the follicles phase whereas in the luteal phase concentration
raise slowly. No negative feedback.
12. What do you think would happen if multiple sperm fused with one egg?
1. HORMONE SECRETED BY THE GROWING FOLLICLE AND IDENTIFY THE ACTION OF THIS
HORMONE ON THE UTERUS
Estrogen. Promotes ovulation.
2. FUNCTION OF LH AND THE GLAND THAT PRODUCES THIS HORMONE
Stimulates the follicular tissues to transform into corpus luteum. Pituitary gland.
3. SIGNIFICANT PROBLEMS FACED BY BONY FISHES PRACTICING EXTERNAL FERTILIZATION
The eggs and sperms might be triggered by the water temperature or the length of daylight.
4. EFFECT OF HIGH ESTROGEN AND PROGESTERONE ON THE ENDOMETRIUM WALL
Oestrogen builds up the endometrium lining while progesterone maintains the growth.
5. HOW THE HYPOTHALAMUS AND OVARIES WORK TOWARDS THE OVULATION PROCESS
The hypothalamus releases GnRH to lead to the secretion of FSH and LH from the anterior
pituitary. FSH stimulates follicle growth aided by LH.
6. HOW OVARIES INFLUENCE MENOPAUSE IN WOMEN
The ovaries stop making the hormones estrogen and progesterone. The ovaries also stop
releasing eggs.
7. DISADVANTAGE OF EXTERNAL FERTILIZATION
Can be triggered by temperature. Require a suitable environment. Low survival rate of the
gametes.
8. STRATEGIES OF EMBRYONIC DEVELOPMENT
Oviparity, ovoviviparity and viviparity
9. DESCRIBE SPERMATOGENESIS
Formation and development of sperm. Begins during puberty and continues throughout
one’s lifetime. Within the testes, sperm form in seminiferous tubules. Starts from the
outermost part of the seminiferous tubules inwards to the lumen of the seminiferous
tubules.
10. STATE AND EXPLAIN THE TYPE OF ASEXUAL REPRODUCTION INVOLVED IN BEE COLONIES
Parthenogenesis. Without sperm, the eggs develop parthenogenetically into haploid male
drones. A queen bee mate only once and stores the sperm and is in control of the release of
sperm. Fertilized eggs can be developed into other queens or sterile worker bees that are
female.
11. WHAT HAPPENS TO THE LEVELS OF FSH AND LH IF BOTH OVARIES ARE REMOVED?
FSH and LH raised rapidly in the follicles phase whereas in the luteal phase concentration
raise slowly. No negative feedback.
12. What do you think would happen if multiple sperm fused with one egg?
