Shared Flashcard Set

Details

The ANS (Ch.15)
N/A
22
Anatomy
Undergraduate 2
10/22/2011

Additional Anatomy Flashcards

 


 

Cards

Term
Define the ANS
Definition
a system of motor neurons that innervate smooth muscle and cardiac muscle as well as glands
Term
What is the main function of the ANS?
Definition
Maintain homeostasis; works with hypothalamus
Term
What are the two divisions of the ANS?
Definition
Sympathetic (fight or flight) and Parasympathetic (rest and digest)
Term
What is the purpose of the ANS?
Definition
Autonomic activation or inhibition of body systems
Term
What is the function of the sympathetic NS?
Definition
Responds to stress: increase body functions that support physical activity; decrease digestive and urinary function
Term
What is the function of the parasympathetic NS?
Definition
Conserve and restore body energy: decrease body functions that support physical activity; increase digestive and urinary function
Term
What is the difference between the neurons of the ANS and those of the CNS?
Definition
the ANS has pre AND post ganglionic neurons which are slower than those in the CNS due to decreased myelin content
Term
Where is the preganglion neuron soma located?
Definition
CNS; Sympathetic: lateral horn of thoracolumbar spinal cord
Parasympathetic: brainstem or sacral spinal cord
Term
Where are the postganglionic neuron soma located?
Definition
PNS
Term
The ventral rami serve what area of the body?
Definition
the limbs
Term
What areas of the body are only served by the sympathetic NS?
Definition
glands of the skin, blood vessel, and arrector pili muscles
Term
What type of CT are the lungs made of?
Definition
Simple squamous CT
Term
Define Terminal ganglia and state their location
Definition
located close to wall of an organ, some in the the head but MOST in the gut; Parasympathetic
Term
What type of ganglia have short postganglionic axons?
Definition
parasympathetic ganglia
Term
What is the "equation" for parasympathetic preganglionic nerves?
Definition
4 cranial nerves + sacral spinal nerves
Term
What are the four cranial nerves with parasympathetic function?
Definition
CN 3, 7, 9, and 10
(Oculomotor, facial, glossopharyngeal, and vagus)
Term
Issues with what cranial nerve will lead to taste problems?
Definition
CN 7 (facial)
Term
Which cranial nerve has involves 90% of preganglionic parasympathetic fiber for the entire body?
Definition
CN X (vagus)
Term
What are the two types of sympathetic ganglia?
Definition
paravertebral (paired) and prevertebral (unpaired)
Term
Sympathetic preganglionic axons are ____ while the postganglionic axons are ____
Definition
short; long
Term
What is the adrenal mudulla?
Definition
highly specialized sympathetic ganglia that secretes norepinephrine and epinephrine (adrenaline)
Term
What is autonomic tone and what structure regulates it?
Definition
balance between sympathetic and parasympathetic branches of the ANS; hypothalamus
Supporting users have an ad free experience!