Week 9: ANS

Question 1

Cell bodies of afferent neurons below the head regions are located within

Answer 1

Bilateral dorsal root ganglia

Question 2

Cell bodies of efferent neurons are located

Answer 2

Within nuclei, which make up the grey matter of the CNS

Question 3

Another name for autonomic neurons

Answer 3

Visceral efferent neurons

Question 4

Where are interneurons located

Answer 4

In the CNS

Question 5

Interneurons travel along

Answer 5

Tracts, which comprise the majority of the CNS white matter

Question 6

Ascending tracts extend

Answer 6

From the spinal cord to the brain

Question 7

Descending tracts extend

Answer 7

From the brain to the spinal cord

Question 8

Association neurons

Answer 8

Interneurons from one brain region to another

Question 9

Unconscious integration occurs

Answer 9

at the spinal cord

Question 10

Conscious integration occurs

Answer 10

at the brain

Question 11

Ganglion

Answer 11

Collection of neuron cell bodies located within the PNS

Question 12

Cell bodies of efferent neurons are always located

Answer 12

In the CNS and form aggregations with other efferent cell bodies within the CNS

Question 13

Nucleus

Answer 13

Aggregations of neuron cell bodies within the CNS

Question 14

Mixed nerve

Answer 14

Comprised of both sensory neuron fibers and motor neuron axons

Question 15

Pre-synaptic/ganglionic neuron cell body is located

Answer 15

In the CNS (brain nucleus/spinal cord gray matter)

Question 16

Post synaptic/ganglionic neuron cell body is located

Answer 16

Within an autonomic ganglion, outside of CNS

Question 17

How many cranial nerves do mammals have?

Answer 17

12

Question 18

What cranial nerves have autonomic neurons?

Answer 18

1. Oculomotor (CN III)
2. Facial (CN VII)
3. Glossopharyngeal (CN IX)
4. Vagus (CN X)

Question 19

Sympathetic division is also called

Answer 19

Thoracolumbar division

Question 20

Parasympathetic division is also called

Answer 20

Craniosacral division

Question 21

Sympathetic generally synapse

Answer 21

Within the sympathetic chain ganglia

Question 22

Parasympathetic generally synapse on

Answer 22

Ganglia in organs they innervate

Question 23

Pre-synaptic cell bodies of SNS neurons are located

Answer 23

In the thoracic and lumbar regions of the spinal cord

Question 24

Splanchnic nerves

Answer 24

• Communicate with pre-vertebral ganglia

- Comprised of pre-synaptic SNS axons that don’t synapse within the paravertebral chain

Question 25

Three splanchnic ganglia

Answer 25

• Celiac ganglion: Near celiac artery
• Cranial mesenteric ganglion: Near cranial mesenteric artery
• Caudal mesenteric artery: Near caudal mesenteric artery

Question 26

Celiac and cranial mesenteric together are called

Answer 26

Celiacomesenteric ganglion plexus

Question 27

Pre SNS neurons that extend cranially to supply structures within the head and thorax synapse onto what post-SNS cell bodies

Answer 27

• Cervicothoracic ganglion
• Middle cervical ganglion
• Cranial cervical ganglion

Question 28

Vagus nerve carries

Answer 28

Pre-PSNS axons from brain to thorax and abdomen

Question 29

Vagosympathetic trunk is composed of

Answer 29

• Pre-SNS axons that extend cranially and synapse in cranial cervical ganglion
• Pre-PSNS axons extending caudally and that synapse on terminal ganglia

Question 30

Do the branches of the ANS have origins from the cervical region of the spinal cord?

Answer 30

Nope

Question 31

How many synapses can occur with SNS and PSNS before synapsing on target tissue?

Answer 31

One

Question 32

Visible autonomic ganglia must contain…

because…

Answer 32

Post-synaptic neuron cell bodies

Pre-synaptic are always in the CNS