(a(i))[3]
Using Fig. 4.1, Describe how the thickness of the lining of the uterus changes over the menstrual cycle.
(a(ii))[1]
State the days shown in Fig. 4.1 when the lining of the uterus breaks down and is shed.
(a(iii))[1]
Draw an X on Fig. 4.1 to indicate the time of ovulation.
(b(i))[3]
Complete the sentence to define the word hormone. A [BLANK] substance made by a [BLANK], transported in the [BLANK], that changes the activity of one or more particular target organs.
(b(ii))[2]
Describe two effects of adrenaline on the body.
(b(iii))[1]
State the name of the organ that secretes adrenaline.