K.C.S.E Biology Q & A - MODEL 2014PP2QN05

K.C.S.E Biology Q & A - MODEL 2014PP2QN05

The diagram below represents the transverse section of the spinal cord.

​(a) Name the part labelled H. 
(b) State two functions of the fluid found in the part labelled J. 
(c) Give a reason for the colour of white matter. 
(d) Name and give the function of the enzyme found at the part labelled K.
Name
Function                    
(e) On the diagram, use an arrow to show the direction of impulse transmission along the neurone labelled 1.

answers

(a) H - cell body; 
(b) Has nutrients for nourishment of neurons, brain, spinal cord;
​Acts as a shock absorber for protection of spinal cord from mechanical damage; 
(c) Contains myelin sheaths (of neurons which are made up of fats that make it have a shiny white appearance); 
(d) Cholinesterase: 
Breaks down Acetyicholine; to acetic acid and choline; 
(e) Correct arrow on neurone 1 points towards the grey matter;