* not completed

. Which of the following statements relating to fertilization are correct? Please select all that apply.

Penile erection is a sympathetic reflex . correct incorrect

Penile erection is due to pooling of blood in the erectile tissues. correct incorrect

During ejaculation the sperm are mixed with secretions from the prostate and seminal vesicles . correct incorrect

Fertilization normally occurs in the uterus . correct incorrect

Fertilization may occur four or more days after ovulation. correct incorrect

* not completed

. Which of the following statements relating to ejaculation and sperm count are correct? Please select all that apply.

A normal sperm count is about 20 million per ml of semen correct incorrect

Immediately after ejaculation, the sperm are capable of fertilizing an ovum correct incorrect

The fertilized egg is also known as a zygote correct incorrect

Following fertilization the egg completes its second meiotic division correct incorrect

The fertilized egg secretes hCG to maintain the corpus luteum correct incorrect

* not completed

. Which of the following statements relating to the placenta are correct? Please select all that apply.

The placenta nourishes the fetus by establishing a dialysis pattern for exchange between the maternal and fetal circulations. correct incorrect

The placental barrier is very thin and freely permeable to glucose and amino acids. correct incorrect

The PO₂ of the blood of the umbilical vein is the same as that in the maternal arterial blood. correct incorrect

The placenta secretes about ten times as much progesterone as the corpus luteum. correct incorrect

The oestrogens secreted by the placenta tend to increase uterine excitability during late pregnancy. correct incorrect

* not completed

. Which of the following statements relating to maternal physiology are correct? Please select all that apply.

Thyroid function is increased during pregnancy correct incorrect

Placental progesterone secretion is highest in the first 8 weeks of gestation correct incorrect

Blood flow to the kidneys is increased in pregnancy correct incorrect

Maternal plasma urea concentration decreases during pregnancy correct incorrect

Maternal respiratory rate is significantly increased during pregnancy correct incorrect

* not completed

. Which of the following statements relating to the hormonal control of lactation are correct? Please select all that apply.

Suckling is the single most important stimulus for milk secretion and ejection correct incorrect

Prolactin stimulates milk ejection correct incorrect

Oxytocin is secreted in response to suckling. correct incorrect

Prolactin stimulates the synthesis and secretion of all the major constituents of milk. correct incorrect

Lactation can be suppressed by dopamine agonists correct incorrect

* not completed

. Which of the following statements relating to lactation are correct? Please select all that apply.

Mature milk has a higher protein content than colostrum. correct incorrect

Colostrum has a higher calorific value than mature milk correct incorrect

During pregnancy, oestrogens stimulate ductal development while progesterone stimulates development of the alveoli. correct incorrect

Following a miscarriage at 5 months gestation, lactation will commence correct incorrect

Placental steroid secretion inhibits lactation during pregnancy. correct incorrect