K.C.S.E Biology Q & A - MODEL 2016PP2QN03

K.C.S.E Biology Q & A - MODEL 2016PP2QN03

The diagram below represents bones at a joint found in the hind limb of a mammal.

​(a) Name the bones labeled X, Y and Z 
X
Y
Z
(b) (i) Name the substance fi)und in the place labeled W. 
(ii) State the function of the substance named in (b) (î) above. 
(c) Name the structure that joins hones together at the joint. 
(d) State the difference between ball and socket joint and the one illustrated in the diagram above. 
(e) Name the structure at the elbow that performs the same function as the patella.

ANSWERS

​(a) X- Femur
 Y- Tibia
 Z- Fibula
(b) (i)  Synovial fluid
(ii)  Lubrication of the joint/ shock absorption
 Distribution of pressure
(c)  Ligament
(d)  Ball and socket joint allows movement in all planes while the illustrated allows movement in one plane only. Accept 360 for all planes 180 for one plane
(e) Olecranon process