Name three main parts of the brain.

Name two parts of the autonomic nervous system.

Write the full forms of the following abbreviations:

(a) CSF

(b) CNS

(c) PNS

(d) ANS

Define the following terms:

(a) Neuron

(b) Nerve

(c) Stimulus

(d) Synaptic cleft

(e) Reflex action

(f) Corpus callosum