[问答题]
1.Outline how treading on a7de 9p +u5me,ny wn +nzwmn:z3/p qp)p drawing pin can bring about the reflex of lift(oeyfbe,9z(n+4 m nf. sado/eing the foot.o+zme4s .e(n( ,dbf e9n y/ofa 2.Describe how the cerebellum exerts overall control over the voluntary movements of the body.
3.Explain how melatonin plays a part in the control of circadian rhythms.
