The diagram below represents some parts of the male reproductive system - NSC Life Sciences - Question 3 - 2019 - Paper 1
Question 3
The diagram below represents some parts of the male reproductive system.
(a) A
(b) B
(c) C
3.1.2 Describe the process of spermatogenesis in part A.
3.1.3 Explain ... show full transcript
Worked Solution & Example Answer:The diagram below represents some parts of the male reproductive system - NSC Life Sciences - Question 3 - 2019 - Paper 1
Step 1
Identify parts: A
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Answer
A refers to the Testis, which is responsible for producing sperm and hormones such as testosterone.
Step 2
Identify parts: B
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B refers to the Epididymis, which serves as a storage and maturation site for sperm.
Step 3
Identify parts: C
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C refers to the Scrotum, which holds and regulates the temperature of the testes for optimal sperm production.
Step 4
Describe the process of spermatogenesis in part A.
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Spermatogenesis occurs in the seminiferous tubules of the testis. Under the influence of testosterone, diploid cells called spermatogonia undergo mitotic divisions to produce primary spermatocytes. Each primary spermatocyte undergoes meiosis, resulting in the formation of four haploid spermatids per each original spermatogonium. These spermatids mature into spermatozoa, a process that takes approximately two months.
Step 5
Explain why a doctor would advise a man to wear underwear that is not tight.
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Answer
A doctor may advise that a man wear looser underwear because tight underwear can raise the temperature of the testes. Elevated temperatures can negatively affect sperm production, leading to lower sperm counts and potentially impacting fertility.
Step 6
Explain ONE reason why a man who does not want to have children will choose to have a vasectomy.
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A man may choose to have a vasectomy to achieve permanent contraception, thus preventing the possibility of fathering children in the future.
Step 7
Explain ONE reason why a man who has had a vasectomy is still capable of ejaculation.
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Even after a vasectomy, the fluid that comprises semen is still produced by the seminal vesicles and prostate gland; however, the sperm will not be present since the vas deferens, which carries sperm, has been cut.
