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Reproductive System and Development — HS Anatomy & Physiology practice questions

9 multiple-choice questions and 9 flashcards on Reproductive System and Development, about 6% of the HS Anatomy & Physiology bank. Every one carries a written rationale.

Written and maintained by the CoStudy team · last updated 2026-10-02 · how we write and review questions

What this chapter covers

Reproductive System and Development is one of 13 chapters in CoStudy's HS Anatomy & Physiology bank, and it holds 9 of the bank's 150 multiple-choice questions — roughly 6% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.

Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.

Free Reproductive System and Development practice questions

6 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.

The placenta lets the mother and fetus exchange gases and nutrients while:

  1. keeping their blood separate
  2. fully mixing their blood
  3. blocking all substances
  4. pumping blood for the fetus

Answer: A — keeping their blood separate

A) Correct — Substances diffuse across thin membranes. B) Their blood does not normally mix. C) Oxygen, nutrients, and wastes cross. D) The fetal heart pumps fetal blood.

In a typical 28-day cycle, ovulation happens around day 14, triggered by a surge of:

  1. LH
  2. progesterone
  3. insulin
  4. oxytocin

Answer: A — LH

A) Correct — The luteinizing hormone surge releases the mature egg. B) Rises after ovulation. C) Controls glucose. D) Causes contractions during labor.

The embryo implants in the:

  1. endometrium of the uterus
  2. lining of the fallopian tube
  3. ovary
  4. cervix

Answer: A — endometrium of the uterus

A) Correct — The lining has thickened to support it. B) Implantation there is a dangerous ectopic pregnancy. C) Releases the egg. D) Is not where implantation normally occurs.

Testosterone is produced mainly by the:

  1. testes
  2. prostate gland
  3. pituitary gland
  4. adrenal medulla

Answer: A — testes

A) Correct — Interstitial cells in the testes make it. B) Adds fluid to semen. C) Releases LH, which stimulates testosterone production. D) Makes epinephrine.

Fertilization usually takes place in the:

  1. uterus
  2. ovary
  3. fallopian tube
  4. cervix

Answer: C — fallopian tube

C) Correct — The fertilized egg then travels to the uterus. A) Is where the embryo implants. B) Releases the egg. D) Is the lower opening of the uterus.

Which hormone maintains the uterine lining during early pregnancy?

  1. FSH
  2. Testosterone
  3. Progesterone
  4. Glucagon

Answer: C — Progesterone

C) Correct — Without it, the lining would shed. A) Stimulates follicle growth. B) Is the main male sex hormone. D) Raises blood glucose.

Reproductive System and Development flashcards

4 cards from the 9 in this chapter.

Menstrual cycle phases?

Follicular (proliferative) → ovulation → luteal (secretory). ~28 days.

Conception?

Sperm fertilizes egg in fallopian tube. Zygote implants in uterus.

Female reproductive organs?

Ovaries (eggs + estrogen/progesterone), fallopian tubes, uterus, vagina.

Gametes and chromosome number?

Sperm and eggs are made by meiosis and have 23 chromosomes. Fertilization forms a zygote with 46.

Practise the full chapter

These are a sample. The full Reproductive System and Development chapter runs 18 items with per-chapter progress tracking, on the web and in the iOS app.

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