(a(i))[2]
State the names of hormones Y and Z in Fig. 1.1.
(a(ii))[2]
On Fig. 1.1, draw a line to represent progesterone levels across the 28-day menstrual cycle.
(a(iii))[1]
State the day in the 28-day menstrual cycle on which the egg is most likely to be released from a follicle.
(a(iv))[1]
State the main location of progesterone production during pregnancy.
(b)[4]
Calculate the percentage increase in the average diameter of the follicle from the start of the menstrual cycle to just before egg release. Step 1 Convert the average starting diameter of a follicle to millimetres (mm). Step 2 Work out the percentage increase. Step 3 State your answer to three significant figures.
(c)[3]
State three features that help a sperm cell adapt to its function.