Birth and Parturition
Biology ⇒ Reproduction and Development
Birth and Parturition starts at 9 and continues till grade 12.
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Describe the changes in the fetal circulatory system that occur immediately after birth.
Describe the physiological changes that occur in the mother’s body immediately after delivery.
Describe the role of the amniotic sac during birth.
Describe the three main stages of labor during human birth.
Describe what happens during the dilation stage of labor.
Explain the role of fetal cortisol in the initiation of labor.
Explain the role of prostaglandins in parturition.
Explain the significance of the positive feedback loop involving oxytocin during labor.
Which hormone is primarily responsible for initiating uterine contractions during parturition? (1) Progesterone (2) Estrogen (3) Oxytocin (4) Prolactin
Which hormone is produced by the placenta and helps maintain pregnancy until birth? (1) Human chorionic gonadotropin (hCG) (2) Prolactin (3) Relaxin (4) Testosterone
Which hormone is responsible for milk ejection after birth? (1) Prolactin (2) Oxytocin (3) Estrogen (4) Progesterone
Which of the following best describes the feedback mechanism involved in parturition? (1) Negative feedback (2) Positive feedback (3) Feedforward regulation (4) Inhibitory feedback
During parturition, the cervix must dilate to approximately _______ centimeters to allow passage of the baby.
Fill in the blank: The _______ feedback mechanism involving oxytocin ensures that uterine contractions intensify during labor.
Fill in the blank: The _______ is the structure that provides oxygen and nutrients to the developing fetus.
Fill in the blank: The hormone _______ is produced by the fetal adrenal gland and contributes to the initiation of labor.
True or False: The cervix remains fully dilated after the baby is delivered.
True or False: The expulsion stage of labor ends with the delivery of the placenta.
True or False: The fetus plays no role in initiating parturition.
True or False: The first breath of a newborn is stimulated by increased carbon dioxide levels in the blood.
