Autonomic nervous system

Question 1

The pns contains cranial nerves and spinal nerves how many are there?

Answer 1

12 pairs cranial nerves

36 pairs spinal nerves

Question 2

The myelinated axons of the first neurons from their point of origin within the CNS to their synapse on the dendrites and cell body of 2nd neurons in an autonomic ganglion

Answer 2

Preganglionic fibers

Question 3

Axons of the 2nd neurons that have their dendrites and cell bodies in an autonomic ganglion. Most of these axons, perhaps all, are non myelinated

Answer 3

Post ganglionic fibers

Question 4

This system is fright or flight

Stimulates results in an effector response that prepares the body for quick and vigorous action

Answer 4

Sympathetic n.s

Question 5

Name some actions of sympathetic n.s

Answer 5

Increased heart rate and blood pressure 
Dilation of iris 
Increased blood supply to heart 
Decreased bowel motility 
Increased blood glucose

Question 6

The sympathetic division is called the ___ part of the autonomic n.s

Answer 6

Thoraco-lumbar

Question 7

Pre ganglionic fibers of the sympathetic n.s are usually __ . They synapse at the ___ ganglion. The neurotransmitter at synapse is ___

Answer 7

Short
Paravertebral or prevertebral ganglion
ACH

Question 8

Sympathetic n.s post ganglionic fibers are usually ___ and synapse at ___. The neurotransmitter at synapse is ___.

Answer 8

Long
Target organ/tissue
Norepinephrine

Question 9

Parasympathetic “maintenance” responses include:

Answer 9

Decreased heart rate
Increased secretion of glands of the digestive tube
Increased peristalsis of the stomach and intestine
Construction of pupil

Question 10

A neuron is the functional cell of the n.s. It receives excitation at a ___ or at a ___.

Answer 10

Synapse, receptor

Question 11

define exteroceptors

Answer 11

stimuli originating from external environment (outside body)

Question 12

define interoceptors (visceroreceptors)

Answer 12

originating from internal organs: (g.i) tract, lungs, heart

Question 13

define proprioceptors

Answer 13

stimulating in joints and ears ti

Question 14

GSA , general somatic afferent

Answer 14

receptors within skin (cutaneous), bones, muscle, joints receive stimuli and convey impulses through somatic afferent- dorsal root fibers to CNS.

Question 15

GSE, general somatic efferent

Answer 15

impulses from CNS travel through somatic efferent ventral root fibers and cause contraction to smooth muscles.
under voluntary control

Question 16

GVA, general visceral afferent

Answer 16

afferent dorsal root fibers convey impulses from visceral organs and blood vessels to CNS

Question 17

GVE, general visceral motor

Answer 17

efferent fibers, also called autonomic motor fibers - ventral root and innervate cardiac muscles, glands,and smooth m.
synapses with a second neuron
under involuntary control

Question 18

the autonomic n.s provides motor innervation to these structures

Answer 18

cardiac m.
smooth m.
glands

Question 19

which portion of the nervous system controls visceral functions such as blood pressure, cardiac function, GIT, urinary bladder, sweating

Answer 19

autonomic n.s

GVE

Question 20

define ganglia

Answer 20

a collection of neuron cell bodies outside the CNS

Question 21

define nucleus

Answer 21

a collection of neuron cell bodies inside the CNS

Question 22

visceral vs somatic

Answer 22

somatic is autonomic, smooth m.

visceral is skeletal muscle , involuntary

Question 23

the parasympathetic nervous system is called the __ part of the autonomic n.s

Answer 23

cranio-sacral

Question 24

what are the paravertebral ganglion, which means they are located closely to the vertebral column

Answer 24

sympathetic trunk ganglia
cervicothoracic ganglion
middle cervical ganglia
cranial cervical ganglia