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KCET Human Reproduction — practice questions — page 2

Explore 40 free Human Reproduction questions in KCET Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Human Reproduction questions and exercises with answers

Showing questions 31–40 of 40.

The mild uterine contractions originating from the fully developed foetus and placenta that initiate parturition are called the:Read the answer and worked solution →The hormone primarily responsible for stronger uterine contractions during parturition is:Read the answer and worked solution →The first milk produced during the initial few days of lactation, rich in antibodies essential for the newborn's immunity, is called:Read the answer and worked solution →Which of the following statements is TRUE?Read the answer and worked solution →How many chromosomes are present in a normal human zygote immediately after fertilisation?Read the answer and worked solution →True or false: human reproductionRead the answer and worked solution →Male or female structure?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Reading the termsRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →

Worked practice questions

The mild uterine contractions originating from the fully developed foetus and placenta that initiate parturition are called the:

  1. Milk-let-down reflex
  2. Lactation reflex
  3. Implantation reflex
  4. Foetal ejection reflex
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Correct answer: D. Foetal ejection reflex

Signals from the mature foetus/placenta induce mild contractions — the **foetal ejection reflex** — which triggers maternal oxytocin release, leading to stronger contractions and ultimately parturition.

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The hormone primarily responsible for stronger uterine contractions during parturition is:

  1. Prolactin
  2. Progesterone
  3. Relaxin
  4. Oxytocin
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Correct answer: D. Oxytocin

**Oxytocin** (from maternal posterior pituitary) acts on uterine muscle to cause stronger contractions, and the resulting contraction further stimulates oxytocin release — a positive-feedback loop driving parturition.

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The first milk produced during the initial few days of lactation, rich in antibodies essential for the newborn's immunity, is called:

  1. Whey
  2. Curd
  3. Colostrum
  4. Cream
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Correct answer: C. Colostrum

**Colostrum** — the first milk — contains several antibodies (chiefly IgA) essential for developing resistance in the newborn. syllabus specifically recommends initial breastfeeding for this reason.

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