Sympathetic nervous system is one of the divisions of the autonomic nervous system. The other divisions are parasympathetic nervous system and enteric nervous system.

Autonomic nervous system is composed of preganglionic neurons and postganglionic neurons.

Similarly, the sympathetic nervous system is composed of postganglionic and preganglionic neurons.

The cell bodies of preganglionic neurons of sympathetic nervous system is found in intermediolateral cell columns of spinal cord segments T-T12 and L1-2 or 3. Therefore, sympathetic nervous system is also called thoracolumbar division.

The cell bodies of parasympathetic nervous system are found in the brainstem nuclei which exit via cranial nerves 3, 7, 9, 10 and also in the sacral spinal cord segements S2-4, therefore parasympathetic nervous system is also known as craniosacral division.

QUESTION:

b. first thoracic

This is the correct answer choice as sympathetic nervous system cell bodies are found in intermediolateral cell column of T1-12 and L1-2 or 3 spinal cord segments. Hence, a sympathetic nerve is most likely to leave via first thoracic vertebra.

Third lumbar is less likely as sympathetic nervous system does not extend to this level in every individual.

7 0

3 years ago

Which statement best summarizes the relationship between time and distance in echolocation and sonar?

Stolb23 [73]

Answer:B

Explanation:

5 0

3 years ago

If there is 135,000 joules of energy at the producer level there is Joules of energy at the primary consumer level

Over [174]

Answer:

13,500 joules of energy

Explanation:

In a food chain, only 10% of energy is transferred from one trophic level to another trophic level.

So if there is 135,000 joules of energy and we transfer 10% to the next trophic level, we get 13,500 joules of energy.

6 0

2 years ago

In what way are all living organisms on earth similar?

sergij07 [2.7K]

They all use the same set of nucleotides

3 0

3 years ago