Answer:
<u>b. first thoracic</u>
Explanation:
Sympathetic nervous system is<u> one of the divisions of the autonomic nervous system</u>. The other divisions are <u>parasympathetic nervous system</u> and <u>enteric nervous system</u>.
Autonomic nervous system is composed of <u>preganglionic neurons</u> and <u>postganglionic neurons.</u>
Similarly, the sympathetic nervous system is composed of postganglionic and preganglionic neurons.
The cell bodies of<u> preganglionic neurons of sympathetic nervous system is found in intermediolateral cell columns of spinal cord segments T-T12 and L1-2 or 3</u>. Therefore, sympathetic nervous system is also called <u>thoracolumbar division.</u>
The cell bodies of parasympathetic nervous system are found in the <u>brainstem nuclei which exit via cranial nerves 3, 7, 9, 10 and also in the sacral spinal cord segements S2-4</u>, therefore parasympathetic nervous system is also known as <u>craniosacral division.</u>
<u>QUESTION:</u>
<u>b. first thoracic</u>
<u>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.</u>
<u>Third lumbar is less likely as sympathetic nervous system does not extend to this level in every individual.</u>
The primary energy system to fuel cycling for 15 minutes is THE AEROBIC GLYCOLYSIS SYSTEM.
There are different energy systems for fueling different types of physical exercise, the type of system that is used depend on the duration of the physical exercise. The energy system that exist are anaerobic glycolysis, aerobic glycolysis, phosphagem system and fatty acid oxidation. The aerobic glycolysis energy system relies on the complete breakdown of glucose. The pyruvate which is the end product of glucose oxidation is further broken down to acetyl coA, which then enters into the citric acid cycle. The aerobic glycolysis energy system is used for physical exercises that last between three to twenty minutes.
Kingdom, phylum, class, order, family, genus, and species is the classification chart levels in order from most broad to least.
