Question

Which of the following connects Spinal cord and sympathetic ganglion of autonomic nervous systems?
A) Ramus ventralis
B) Ramus communicans
C) Ramus dorsalis
D) Connective

Answer 1

To approach this question we need to understand the structure of the sympathetic nervous system as sympathetic ganglia, or autonomic ganglia, are the ganglia of the sympathetic nervous system.

Complete answer:

1. Ramus ventralis is the ventral ramus (ramus stands for branch in Latin) is the anterior division of a spinal cord. The ventral rami supplies the antero-lateral parts of the trunk and the limbs. They are mainly larger than the dorsal rami.
2. Ramus communicans is the Latin term used for a nerve which connects two other nerves, and can be called as the communicating branch between the spinal cord and the sympathetic trunk.
   3)Ramus Dorsalis is the posterior division of the spinal cord. The dorsal ramus is the dorsal branch of a spinal cord that forms from the dorsal root of the nerve after it emerges from the spinal cord. The spinal cord is formed from the dorsal and ventral rami. The dorsal ramus carries information that supplies muscles and sensation to the human back.
3. Connectives are connective tissue layers that surround the peripheral nerves. For e.g.- An endoneurium connective surrounds an individual axon. Bundles of axons called fascicles are surrounded by a perineurium connective.

Additional Information: After the spinal cord exits the intervertebral foramen, it branches into the dorsal ramus, the ventral ramus, and the ramus communicans. Each of these three structures carry both sensory and motor information. Each spinal nerve carries both sensory and motor information, via efferent and afferent nerve fibres.

Thus, the correct answer is option B (Ramus communicans).

Note: It is to be noted that the structure of the nervous system is properly understood and the division of the three nerves from the intervertebral foramen is grasped.Every nerve in spinal carries both sensory and motor information.