Efferent Flashcards
• What are the divisions of the autonomic nervous system?
The divisions of the autonomic nervous system are the sympathetic nervous system, parasympathetic nervous system, and the enteric nervous system
What are the CNS control centers of the ANS?
The medulla oblongata, the pons, and the hypothalamus.
While there are control centers in the CNS for ANS function, the ANS primarily works by way of reflexes. What division of the nervous system do long reflexes integrate with?
The CNS.
What division of the nervous system do short reflexes integrate with?
The PNS.
What are aggregations of cell bodies referred to as in the CNS?
Aggregations of cell bodies in the CNS are referred to as nuclei.
What are aggregations of cell bodies referred to as in the PNS?
Aggregations of cell bodies in the PNS are referred to as ganglia.
Where are the autonomic motor nuclei specifically located within the gray matter of the spinal cord?
The autonomic motor nuclei are located in the antero-lateral horn.
Where are the visceral sensory nuclei specifically located within the gray matter of the spinal cord?
The visceral sensory nuclei are located in the postero-lateral horn.
The SNS is also referred to as the thoracolumbar division of the ANS. Why?
The cell bodies of the neurons originate from the thoracic and lumbar regions
The PNS is also referred to as the craniosacral division of the ANS. Why?
The cell bodies of the neurons originate from the cranial and sacral regions.
Why are the cells in the adrenal medullae considered to be modified postganglionic sympathetic neurons?
The adrenal medullae is under control of preganglionic sympathetic neurons. The cells in the adrenal medulla are modified postganglionic sympathetic neurons and secrete epinephrine into the blood stream instead of neurotransmitters into a synaptic cleft.
What are the cells in the adrenal medullae?
Chromaffin cells.
What do these cells secrete?
Mostly epinephrine, but also norepinephrine.
