K.C.S.E Biology Q & A - MODEL 2011PP2QN04

K.C.S.E Biology Q & A - MODEL 2011PP2QN04

The diagram below represents a section of the human brain.

(i)Name the structures labelled P and R. 
P
R
(ii) State two functions of the part labelled Q. 
(b) (i) Name two reproductive hormones secreted by the pituitary gland in women. 
(ii) State one function of each of the hormones named in (b)(i) above. 

answers

(a) (i) - is cerebral hemisphere/cerebrum;
R - medulla oblongata; 
(ii) Muscular co-ordination; maintaining body posture; manual/motar dexterity;
(b) (i) Follicle stimulation hormone; luteinizing hormone; oxytocin; prolactin;
(ii) FSH - stimulates secretion of oestrogen; stimulates development of the Graafìan follicle;
LH - Brings about ovulation; causes development of corpus luteum;
Oxytocin - causes contraction of uterus; causes expulsion of milk from mammary glands;
Prolactin - stimulates milk production/secretion;