The junction between two neurons is called:

Give one example of chemotropism.

$(a)$ Name the part of the brain which controls:
$(i)$ voluntary actions,
$(ii)$ involuntary actions.
$(b)$ What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origin of the two.

$A$ protective and an insulating sheath of myelin found around the axon is made up of ..........

State in brief how the communication between the central nervous system and the other parts of the body is facilitated.

Trace the sequence of events through a reflex arc that occurs when a bright light is focused on your eyes.