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) A
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Answer
A is the Testis.
Step 2
Identify parts:
(b) B
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Answer
B is the Epididymis.
Step 3
Identify parts:
(c) C
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Answer
C is the Scrotum.
Step 4
Describe the process of spermatogenesis in part A.
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Answer
Spermatogenesis occurs under the influence of testosterone. Initially, diploid cells in the seminiferous tubules undergo meiosis, resulting in haploid sperm cells. This process takes place in the testes, specifically within the germinal epithelium of the seminiferous tubules.
Step 5
Explain why a doctor would advise a man to wear underwear that is not tight.
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Answer
Wearing tight underwear can raise the temperature of the testes, which is detrimental for sperm production. The testes need to be at a lower temperature than the body's core temperature for successful sperm maturation.
Step 6
Explain ONE reason why a man who:
(a) Does not want to have children will choose to have a vasectomy
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A man who does not want to have children chooses to have a vasectomy to prevent the risk of fathering a child, as this procedure cuts the vas deferens, eliminating sperm from the semen.
Step 7
Explain ONE reason why a man who:
(b) Has had a vasectomy is still capable of ejaculation
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Even after a vasectomy, the fluid part of the semen will still be produced by the seminal vesicles and prostate gland, allowing for ejaculation despite the absence of sperm.
