Noesis
Level 1 — RecognitionReproductive System & Development

Reproductive System & Development

⏱ 20 minutes30 marksprintable — key stays hidden on paper

Level 1: Recognition Test

Time limit: 20 minutes Total marks: 30

Section A — Multiple Choice (1 mark each)

Choose the single best answer.

Q1. Which structure is the site of sperm production?

  • A) Epididymis
  • B) Seminiferous tubules
  • C) Vas deferens
  • D) Prostate gland

Q2. The corpus luteum secretes mainly:

  • A) FSH
  • B) Oestrogen only
  • C) Progesterone
  • D) Testosterone

Q3. Fertilization in humans normally occurs in the:

  • A) Uterus
  • B) Ovary
  • C) Oviduct (fallopian tube)
  • D) Cervix

Q4. The hollow, fluid-filled ball of cells formed after cleavage is the:

  • A) Gastrula
  • B) Blastula (blastocyst)
  • C) Morula
  • D) Zygote

Q5. Which hormone surge triggers ovulation?

  • A) LH
  • B) Progesterone
  • C) hCG
  • D) Prolactin

Q6. One mature oogonium completing oogenesis produces:

  • A) Four functional ova
  • B) Two functional ova
  • C) One ovum and polar bodies
  • D) Four polar bodies

Q7. The placenta is NOT responsible for:

  • A) Gas exchange
  • B) Nutrient transfer
  • C) Mixing of maternal and fetal blood
  • D) Hormone secretion

Q8. A barrier method of contraception is the:

  • A) Combined pill
  • B) Condom
  • C) IUD (hormonal)
  • D) Vasectomy

Q9. The hormone detected by pregnancy tests is:

  • A) FSH
  • B) LH
  • C) hCG
  • D) Oxytocin

Q10. Oxytocin's main role during birth is to:

  • A) Thicken the endometrium
  • B) Stimulate uterine contractions
  • C) Suppress ovulation
  • D) Produce milk protein

Section B — Matching (1 mark each, 5 marks)

Q11. Match each structure to its function.

Structure Function
(a) Epididymis (i) Nourishes and supports developing sperm
(b) Endometrium (ii) Stores and matures sperm
(c) Sertoli cells (iii) Lining where implantation occurs
(d) Acrosome (iv) Releases enzymes to penetrate the egg
(e) Cervix (v) Neck of the uterus opening to vagina

Section C — True/False WITH Justification (2 marks each, 15 marks)

State True or False (1 mark) AND give a one-line justification (1 mark).

Q12. Spermatogenesis produces four functional sperm from one primary spermatocyte.

Q13. FSH stimulates development of ovarian follicles in females.

Q14. During cleavage the total mass of the embryo increases greatly.

Q15. The blastocyst implants into the endometrium about a week after fertilization.

Q16. High progesterone levels during pregnancy prevent further ovulation.

Q17. Gastrulation forms the three primary germ layers.

Q18. A vasectomy blocks the release of eggs.

Answer keyMark scheme & solutions

Section A (10 marks)

Q1. B — Seminiferous tubules within the testes are the actual site of spermatogenesis; the epididymis only stores/matures sperm. (1)

Q2. C — After ovulation the corpus luteum mainly secretes progesterone (plus some oestrogen) to maintain the endometrium. (1)

Q3. C — The egg is fertilized in the upper oviduct; the zygote then travels to the uterus for implantation. (1)

Q4. B — Cleavage → morula → blastula/blastocyst (hollow, fluid-filled). (1)

Q5. A — A sharp LH surge triggers rupture of the mature follicle (ovulation). (1)

Q6. C — Oogenesis yields one large functional ovum and 2–3 small polar bodies (unequal cytoplasmic division). (1)

Q7. C — Maternal and fetal blood do NOT mix; exchange occurs across the placental membrane. (1)

Q8. B — The condom is a physical barrier; the pill/IUD are hormonal, vasectomy is surgical. (1)

Q9. C — Human chorionic gonadotropin (hCG) is secreted by the embryo and detected in urine tests. (1)

Q10. B — Oxytocin stimulates strong uterine contractions during labour (positive feedback). (1)

Section B (5 marks)

Q11.

  • (a) Epididymis → (ii) Stores and matures sperm (1)
  • (b) Endometrium → (iii) Lining where implantation occurs (1)
  • (c) Sertoli cells → (i) Nourishes and supports developing sperm (1)
  • (d) Acrosome → (iv) Releases enzymes to penetrate the egg (1)
  • (e) Cervix → (v) Neck of the uterus (1)

Section C (14 marks)

Q12. TRUE (1). One primary spermatocyte → two secondary spermatocytes → four spermatids → four functional sperm; unlike oogenesis, division is equal. (1)

Q13. TRUE (1). FSH (follicle-stimulating hormone) stimulates growth of ovarian follicles and oestrogen secretion. (1)

Q14. FALSE (1). During cleavage cell number increases but total mass stays roughly constant — cells divide without net growth. (1)

Q15. TRUE (1). The blastocyst reaches and implants in the endometrium roughly 6–7 days after fertilization. (1)

Q16. TRUE (1). Sustained high progesterone (and oestrogen) suppresses FSH/LH via negative feedback, preventing new follicle maturation and ovulation. (1)

Q17. TRUE (1). Gastrulation reorganises the blastula into ectoderm, mesoderm and endoderm. (1)

Q18. FALSE (1). A vasectomy cuts/ties the vas deferens, blocking sperm — not eggs; egg release is unaffected in males (males have no eggs). (1)

[
  {"claim":"Spermatogenesis yields 4 sperm per primary spermatocyte","code":"sperm_per_meiosis = 2*2\nresult = (sperm_per_meiosis == 4)"},
  {"claim":"Oogenesis yields 1 functional ovum per primary oocyte","code":"functional_ova = 1\nresult = (functional_ova == 1)"},
  {"claim":"Blastocyst implantation timing ~6-7 days after fertilization","code":"days = 7\nresult = (6 <= days <= 8)"},
  {"claim":"Cleavage: cell number doubles each division while mass constant","code":"cells = 1\nfor _ in range(4):\n    cells *= 2\nresult = (cells == 16)"}
]