Card Set Information
Afferent nerves also known as
Efferent nerves also known as
What is the major part of the nervous system that controls endocrine funtion?
Hypothalamic pituitary axis
What ions are involved, and which direction do these ions flow in a nerrve impulse?
Na & K
Na moves into nerve fiber, K moves out.
True/False: electrical impulses travel faster through a larger diameter nerve.
True: b/c of decreased internal resistance.
multiple axons synapse on a single connecting nerve
axon branches out to multiple neurons
The highest forms of mental activity occur where?
What part of the nervous system is known as the "thermostat" of the body and releases neurotrasmitters that affect the secretion of pituitary hormones?
True/False: The pons is known as the bridge of motor control.
What is another name for the medulla oblongata?
The medulla oblongata contains reflex centers for the control of what two important functions?
What is hydrocephalus?
Builldup of CSF. Increased intercranial fluid pressure, brain damage may occur.
What are the layers of the meninges in order from outside to inside?
Dura mater--Subarchniod space--Pia mater
Which layer of the meninges help form the blood-brain barrier?
Where is CSF produced?
Dorsal root contains which type of nerves?
Ventral root contains which type of nerves?
What are the three major levels of CNS function?
Spinal cord level
Lower brain level
What are the characteristics of a small molecule type neurotransmitter?
rapidly acting, acute nervous system response
What are the characteristics of a neuropeptide type neurotransmitter? What is one example?
slow acting, more prologed effect; insulin
Which muscles are innervated by the brachial plexus?
muscles of the forelimb.
Which nerves make up the brachial plexus?
last 3-4 cervical and first 2 spinal nerves
Which nerves make up the lumbosacral plexus?
last 3-5 lumbar and first 1-2 sacral
Cranial nerve I
Cranial nerve II
Cranial nerve III
Oculomotor nervee- eye muscles, ciliary and iris
Cranial nerve V
Trigeminal nerve- eye and face; mastication
Cranial nerve VII
Facial nerve- ear and taste, facial expression
Cranial nerve VIII
Vestibulocochlear nerve- hearing and equalibirium
Cranial nerve X
The sympathetic nervous system provides innervation to:
smooth muscle, cardiac muscle and glands
Describe the general sypathetic pathway.
impulses travel from the thoracic and lumbar portions of the spinal cord to the preganglionic fibers to the ganglionic chain to post ganglionic fibers to the organ.
What is the one exception to the general sypathetic pathway?
The adrenal gland, only has one fiber.
Describe the general parasympathetic pathway.
Impulses are distributed to visceral organs by cranial nerves.
Which nerve provides parasympathetic innervation to the heart, lungs, and abdominal viscera?
Cranial nerve X- Vagus Nerve
Sympathetic comes from what portions of the spinal cord?
thoracic & lumbar
Parasympathetic comes from what portions of the spinal cord?
cranial & sacral
Which (sym/parasym) have short pre-ganglionic fibers and long post ganglionic fibers?
What is the major function of the ANS?
Atrophine would do what to the iris?
What kind of response to acetylcholine-like drugs cause?
Nerve fibers that release acetylcholine are classifed as ______ fibers.
What enzyme degrades acetylcholine at the synapse after a nerve impulse?
What neurotransmitter do adrenergic fibers produce?
From where are epinephrine and norepinephrine released during sympathetic stimulation?
Does the duration of the action produced by epi/norepi last longer from the adrenal gland or from the nerve ending?