Human reproduction - JSS1 Basic science Past Questions and Answers - page 2
What is the purpose of menstruation if pregnancy does not occur?
To release an egg
To prepare the uterus for implantation
To shed the uterine lining
When does implantation of the embryo occur?
Before fertilization
After menstruation
After fertilization
What is the purpose of menstruation in the female reproductive system?
The purpose of menstruation is to shed the uterine lining, which prepares the uterus for a potential pregnancy in case fertilization does not occur.
How does ovulation relate to the timing of a woman's menstrual cycle?
Ovulation typically occurs around the middle of a woman's menstrual cycle, approximately 14 days before the start of her next period. It marks the release of an egg from the ovary, which is the most fertile time in the cycle.
What happens during fertilization in human reproduction?
Fertilization occurs when a sperm cell penetrates and combines with an egg cell, usually in the fallopian tube. This creates a new cell called a zygote, which has the potential to develop into an embryo and eventually a fetus.
Where does fertilization usually take place in the female reproductive system?
Fertilization usually takes place in the fallopian tube, where the sperm and egg meet and combine to form a zygote.
How does the body prepare for menstruation and ovulation?
The body undergoes hormonal changes that stimulate the growth of the uterine lining during the menstrual cycle. If fertilization does not occur, hormonal changes trigger the shedding of this lining, resulting in menstruation. Ovulation is triggered by a surge in luteinizing hormone (LH), which causes the release of an egg from the ovary.
What happens to the uterine lining if fertilization occurs?
If fertilization occurs, the uterine lining thickens to support the implantation of the embryo. This provides a nourishing environment for the developing embryo to grow and develop into a fetus.