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Biology 30 · Worksheets

Reproduction · Set B

Ten questions of mixed difficulty, covering Reproduction. Print it, or work through it on screen — the answer key starts on its own page.

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Reproduction · Set B

Biology 30 · maddyhelps.com

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Circle the best answer for each question. Show your work in the space provided.

  1. Ovulation is triggered by a sudden surge of which hormone?

    1. a) oxytocin
    2. b) LH (luteinizing hormone)
    3. c) progesterone
    4. d) FSH

  2. In males, what does FSH (follicle-stimulating hormone) do?

    1. a) triggers ejaculation
    2. b) lowers body temperature
    3. c) stimulates testosterone production
    4. d) stimulates sperm production

  3. At menopause, the ovaries stop responding to hormones. What happens to FSH and LH levels?

    1. a) they rise
    2. b) they stay the same
    3. c) they drop to zero
    4. d) they fall

  4. During the follicular phase, estrogen levels rise. What does this cause?

    1. a) menstruation to begin
    2. b) the corpus luteum to break down
    3. c) the endometrium to thicken
    4. d) milk production

  5. After ovulation, the empty follicle becomes the:

    1. a) corpus luteum, which secretes progesterone
    2. b) endometrium, which lines the uterus
    3. c) zygote, which divides by mitosis
    4. d) placenta, which feeds the embryo

  6. How does the combined birth control pill prevent ovulation?

    1. a) Its estrogen and progesterone inhibit FSH and LH release through negative feedback
    2. b) It raises LH so high that ovulation cannot happen
    3. c) It destroys eggs in the ovary
    4. d) It blocks the oviducts

  7. Which hormone is mainly responsible for male secondary sex characteristics, such as a deeper voice?

    1. a) progesterone
    2. b) prolactin
    3. c) estrogen
    4. d) testosterone

  8. About how long is a typical menstrual cycle?

    1. a) 14 days
    2. b) 7 days
    3. c) 28 days
    4. d) 40 days

  9. Where are sperm produced?

    1. a) prostate gland
    2. b) seminiferous tubules of the testes
    3. c) epididymis
    4. d) vas deferens

  10. How does a vasectomy prevent pregnancy?

    1. a) The testes stop producing testosterone
    2. b) The oviducts are tied
    3. c) The vas deferens is cut or blocked, so sperm cannot leave the body
    4. d) Sperm are made unable to swim

Answer key · Reproduction · Set B

Biology 30 · maddyhelps.com

  1. b) LH (luteinizing hormone) — A spike in LH from the pituitary, around day 14, makes the mature follicle release its egg. FSH's main job is earlier: growing the follicle.
  2. d) stimulates sperm production — The same hormones work in both sexes. In males, FSH drives sperm production, while LH tells the testes to make testosterone.
  3. a) they rise — Without estrogen and progesterone from the ovaries, there is no negative feedback, so the pituitary keeps releasing more FSH and LH.
  4. c) the endometrium to thicken — Estrogen from the growing follicle rebuilds the uterine lining after menstruation, getting it ready in case an egg is fertilized.
  5. a) corpus luteum, which secretes progesterone — The leftover follicle turns into the corpus luteum, a temporary gland whose progesterone keeps the uterine lining ready.
  6. a) Its estrogen and progesterone inhibit FSH and LH release through negative feedback — The pill's hormones mimic high natural levels, so the hypothalamus and pituitary hold back FSH and LH. No FSH means no follicle; no LH surge means no ovulation.
  7. d) testosterone — Testosterone, made in the testes, drives male secondary sex characteristics and supports sperm production.
  8. c) 28 days — The textbook cycle is 28 days, with ovulation around day 14. Real cycles vary quite a bit from person to person, and that is normal.
  9. b) seminiferous tubules of the testes — Sperm are made in the seminiferous tubules inside the testes. The epididymis stores them while they mature, and the vas deferens carries them out.
  10. c) The vas deferens is cut or blocked, so sperm cannot leave the body — Cutting the vas deferens stops sperm leaving the testes. Hormone levels are unaffected. Tying the oviducts is the female procedure, tubal ligation.