$\mathrm{i}-\mathrm{d}$, ii -b , iii -a , iv -c

i - a, ii - d, iii - b, iv - c

i - b, ii - a, iii - d, iv - c

i - c, ii - b, iii - a, iv - d

i - b, ii - a, iii - d, iv - c

i - c, ii - d, iii - a, iv - b

i-d, ii -c, iii -a, iv - b

i - a, ii - d, iii - c, iv - b

Ascending spinal tracts conduct sensory impulses to the brain.

Dorsal root ganglion has unipolar sensory neurons.

Descending spinal tracts carry motor impulses from the brain to spinal cord.

Watering of mouth on sight of food is a spinal reflex.

Ramus dorsalis

Ramus ventralis

Ramus communicans

filum terminale