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Human Reproduction and STDs
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Human Reproduction and STDs
Human Reproduction and STDs
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1
Question
What is puberty and when does it generally occur in human females and males?
Answer
Puberty is the age at which changes occur in the human body as it matures. It usually occurs around 10 to 11 years in females and 12 to 13 years in males.
2
Question
What are the main components of the female reproductive system?
Answer
The female reproductive system consists of the ovaries, uterus, oviducts (fallopian tubes), and vagina.
3
Question
What are the key parts of the male reproductive system involved in sperm production and transport?
Answer
The testes (where sperms are produced), epididymis (a coiled tube where sperm passes through and is stored), seminal vesicle and prostate gland (which secrete fluid that mixes with sperm), and the penis (through which semen passes out of the body).
4
Question
What role do the seminal vesicle and prostate gland play in the male reproductive system?
Answer
They produce fluids that mix with sperm to form semen, which is the mixture that eventually passes out of the body during ejaculation.
5
Question
What initiates the menstrual cycle and what is the role of follicle stimulating hormone (FSH)?
Answer
The menstrual cycle is started by the release of follicle stimulating hormone (FSH) from the pituitary gland. FSH causes an egg (ovum) to mature inside a Graafian follicle in one of the ovaries.
6
Question
How does oestrogen affect the uterus during the menstrual cycle?
Answer
Oestrogen, secreted by the Graafian follicle, causes the lining of the uterus to thicken in preparation for the possible implantation of a fertilized egg.
7
Question
What happens to FSH levels as oestrogen levels rise during the menstrual cycle?
Answer
As oestrogen levels rise, the production of FSH from the pituitary gland is reduced.
8
Question
What triggers ovulation in the menstrual cycle and what hormone is responsible?
Answer
Ovulation is triggered by the release of luteinising hormone (LH) from the pituitary gland, which occurs after oestrogen levels begin to drop.
9
Question
What happens to the Graafian follicle after ovulation?
Answer
After ovulation, the remains of the Graafian follicle form the corpus luteum, which starts to produce progesterone about a week later.
10
Question
What is the role of progesterone in the menstrual cycle?
Answer
Progesterone stimulates the lining of the uterus to thicken further, supporting potential implantation of a fertilized egg.
11
Question
What occurs if the egg is not fertilized during the menstrual cycle?
Answer
If the egg is not fertilized, the corpus luteum breaks down, progesterone levels fall, and the uterine lining breaks down and is discharged from the body as menstruation (period).
12
Question
When does ovulation typically occur during the menstrual cycle?
Answer
Ovulation typically occurs around day 14 of the approximately 28-day menstrual cycle.
13
Question
How does menstruation relate to pregnancy?
Answer
If fertilization and implantation occur after ovulation, the woman becomes pregnant, which stops the monthly menstruation cycle.
14
Question
What is menopause and what are its effects on a woman’s reproductive system?
Answer
Menopause is when a woman’s ovaries stop producing eggs, leading to the end of menstruation and the inability to become pregnant due to a gradual decline in sex hormone production.
15
Question
Describe the process of sexual intercourse relevant to human reproduction.
Answer
Sexual intercourse occurs when the penis is inserted into the vagina. Stimulation causes blood to fill spaces in the spongy tissue of the penis, making it erect. Sexual stimulation leads to ejaculation, releasing semen containing sperm into the top part of the vagina.
16
Question
After ejaculation, how do sperm travel toward fertilization in the female reproductive system?
Answer
Sperm swim through the cervix and uterus and into the fallopian tubes, where fertilization of the egg can occur.
17
Question
What is fertilisation and where does it occur in the female reproductive system?
Answer
Fertilisation is when sperm meets an egg during sexual intercourse if an egg is present in the fallopian tube. It occurs in the fallopian tube where the sperm penetrates the egg to form a zygote.
18
Question
Describe the process of fertilisation leading to the formation of a zygote.
Answer
During fertilisation, many sperms surround the egg trying to penetrate its outer membrane. Only the head of one sperm enters the egg while its tail remains outside. The sperm nucleus fuses with the egg nucleus to form a zygote.
19
Question
How does the zygote move and develop after fertilisation?
Answer
The zygote is pushed along the fallopian tube towards the uterus by cilia. In the uterus, it implants itself into the wall and begins to develop and grow into a baby.
20
Question
What is an embryo and when does implantation occur?
Answer
An embryo is the developing organism after the zygote starts dividing into more cells. Implantation occurs when the embryo embeds itself into the wall of the uterus or womb to develop further.
21
Question
At what stage of pregnancy is the developing baby called a foetus, and what major developments occur then?
Answer
After 12 weeks, the developing baby is called a foetus. At this stage, body organs develop and the foetus looks like a miniature baby. The placenta also develops, growing into the uterus wall and connecting to the baby via the umbilical cord.
22
Question
What is the role of the placenta and umbilical cord during pregnancy?
Answer
The placenta grows into the uterus wall and is linked to the developing baby by the umbilical cord. They allow for the exchange of nutrients and waste products between the mother and baby.
23
Question
What hormone is released when the baby is ready to be born, and what is its function?
Answer
Oxytocin is released, which aids in the contraction of the muscular wall of the uterus. This causes labor to begin by helping the uterus contract, the amniotic sac to burst, and the cervix to open.
24
Question
Describe the three stages of birth (labor).
Answer
Stage 1: The uterus contracts and the cervix opens. Stage 2: Powerful contractions push the baby down through the cervix and out through the vagina. Stage 3: The uterus contracts and expels the placenta, then quickly reduces in size.
25
Question
What is contraception and what are the four main methods of birth control?
Answer
Contraception is used to prevent pregnancy, allowing people to choose when to have children and how many. The four main methods are Natural, Barrier, Hormonal/Chemical, and Surgical.
26
Question
What is pre-natal (antenatal) care and why is the mother's diet important during pregnancy?
Answer
Pre-natal care is the care of the pregnant mother and developing baby before birth. The mother's diet is important because the baby relies on her nutrients (protein, carbohydrates, fats, vitamins, minerals) to grow healthy organs and bones.
27
Question
How is the development and health of the baby monitored during pregnancy?
Answer
Regular clinic visits check the mother's blood pressure, uterus size, urine, and weight to detect complications. Ultrasound scans use high-frequency sound waves to produce images of the foetus, checking size and growth of the brain and spine.
28
Question
Why can some drugs, smoking, and alcohol be harmful during pregnancy?
Answer
Drugs can pass through the mother's blood to the baby via the placenta, potentially causing miscarriage, stillbirth, or abnormalities. Smoking and alcohol can cause lower birth weight and affect the baby's nervous system.
29
Question
How can diseases affect pregnancy, and which diseases can pass from mother to baby?
Answer
Bacteria and viruses causing diseases can pass from mother to baby through the placenta. Sexually transmitted diseases like syphilis, herpes, and HIV can infect the baby while in the uterus.
30
Question
What is post-natal care and why is breastfeeding important?
Answer
Post-natal care is care for the mother and baby after birth. Breastfeeding is important because the mammary glands produce colostrum, rich in nutrients and antibodies that protect the infant from infections and boost the immune system, also aiding mother-baby bonding.