Step 3: Describe the autonomic nervous system Name the two divisions of the ANS

Question

Step 3: Describe the autonomic nervous system Name the two divisions of the ANS Outline the basic functional differences between the sympathetic and parasympathetic divisions of the ANS experienced by your body experienced by your body sympathetic and parasympathetic divisions sympathetic and parasympathetic neurotransmitters. Give examples of "fight or flight" responses Name examples of "resting and digesting" responses Describe three major anatomical differences between the Describe major biochemical differences between the Study textbook Table 15.1 for a summary of majo anatomical and physiological differences between the sympathetic and parasympathetic divisions. Step 4: Explain the outflow of the parasympathetic division of the ANS Describe how the parasympathetic division relates to the Name the cranial nerves that support parasympathetic Describe the precise locations of the preganglionic brain, and define cranial outflow fibers and postganglionic neurons for each of the following cranial nerves: Outflow via the oculomotor nerve (III) Outflow Outflow via the facial nerve (VII) Outflow Explain how the parasympathetic division relates to the via the glossopharyngeal nerve (IX) via the vagus nerve (X) sacral spinal cord, and describe sacral outflow

Explanation / Answer

The autonomic nervous system(ANS) is a division of peripheral nervous system(PNS) that supplies smooth muscles and glands and influences the function of internal organs.

--the ANS is divided into parasympathetic nervous system and sympathetic nervous system.

--parasympathetic nervous system- controls homeostasis and body's rest and digest response.

Sympathetic nervous system- it's role is to mobilize the body's fight and flight response.

--example of fight and flight responses

1) heart rate increases

2) bronchi tubes in lungs dilate

3) pupils dilate

4) muscles contract

5) saliva production is reduced

6) conversion of glycogen to glucose is increased

7) many of the functions of digestion is stopped in stomach.

--example of resting and digesting response

Opposite of fight and flight responses like heart rate drops, saliva is increased, digestive enzymes are released etc.

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