Question

Which of the following is NOT an area where PRE ganglionic fibers of the sympathetic division would synapse with ganglionic neurons:

  

adrenal glands

   

sympathetic chain ganglia

   

collateral ganglia

   

smooth muscle lining blood vessels

Answer 1

ANSWER IS OPTION A -- ADRENAL GLAND

in all other area the pre ganglionic fibre of sympathetic division synapse with ganglia and the post ganglionic fibers are getting innervated.

Sympathetic innervation to the adrenal medulla is from the T10 to L1 spinal cord segments ,this pre ganglionic fibers are projected to the interior of the adrenal gland called adrenal medulla.Here their is no synapsis with a ganglia before innervating.

The bilaterally symmetric sympathetic chain ganglia, also called the paravertebral ganglia, are located just ventral and lateral to the spinal cord. The chain extends from the upper neck down to the coccyx.

Collateral ganglia (or prevertebral ganglia) are sympathetic ganglia which lie between the sympathetic chain and the organ of supply. They are the site of relay of the preganglionic sympathetic fibres that supply abdominal and pelvic viscera.

Sympathetic fibers from the superior cervical ganglion innervate blood vessels (vasoconstriction),