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Describe a sexually transmitted infection (STI) as an infection that is transmitted through sexual contact
1 Answer Explain the role of hormones in controlling the menstrual cycle and pregnancy, limited to FSH, LH, progesterone and oestrogen
1 Answer Describe the sites of production of oestrogen and progesterone in the menstrual cycle and in pregnancy
1 Answer Describe the menstrual cycle in terms of changes in the ovaries and in the lining of the uterus
1 Answer State that some pathogens and toxins can pass across the placenta and affect the fetus
1 Answer Describe the function of the placenta and umbilical cord in relation to the exchange of dissolved nutrients, gases and excretory products between the blood of the mother and the blood of the fetus
1 Answer Identify on diagrams and state the functions of the following in the development of the fetus: umbilical cord, placenta, amniotic sac and amniotic fluid
1 Answer State that in early development, the zygote forms an embryo which is a ball of cells that implants into the lining of the uterus
1 Answer Compare male and female gametes in terms of: size, structure, motility and numbers
1 Answer Explain the adaptive features of egg cells, limited to: energy stores and the jelly coat that changes at fertilisation
1 Answer
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