(a) Which cells are termed as the structural and functional units of the nervous tissue ?
(b) Which cells act as supporting and packing cells in the brain, spinal cord and ganglia ?
(c ) What is the function of neurosecretory cells of the hypothalamus of the vertebrate brain ?

Explanation

(a) Neurons (nerve cells) (b) Neuroglia cells
(c ) Neurosecretory cells of the hypothalamus of the vertebrate brain secrete neurohormones, which control the release of pituitary hormones.