Module 9

Question 1

Autonomic Nervous Sys.

Answer 1

Involuntary: heart, lungs, digestive sys.
Parasympathetic N Sys.
Sympathetic N Sys.

Question 2

Central Nervous Sys.

Answer 2

Brain

Spinal Cord

Question 3

Peripheral Nervous Sys.

Answer 3

Nervous tissue outside the CNS 
12 pairs of cranial nerves
31 pairs of spinal nerves
peripheral sensory receptors
Can be further divided into Autonomic N Sys & the Somatic N Sys.

Question 4

Autonomic Nervous Sys.

Answer 4

Sympathetic
Parasympathetic
innervates visceral organs unconsciously controlled & are smooth or cardiac muscle
Causes speed changes

Question 5

Sympathetic N. Sys.

Answer 5

Fright, Fight or Flight
Increase HR, blood flow, goosebumps, pupil dilation
No desire to eat

Question 6

Parasympathetic N. Sys

Answer 6

Rest & Digest

Decreased HR, blood pressure & respiration. Constriction of pupils. Increased secretions & urinations.

Question 7

Autorhythmicity

Answer 7

peristalsis (wave-like smooth muscle contractions of the G I Tact) or beat without being connected to the ANS

Question 8

Dual autonomic innervation

Answer 8

Innervated by nerves from both sympathetic & parasympathetic. Opposite divisions.
Heart is a good example

Question 9

Neuroefector synapse

Answer 9

Junction between postganglionic neuron & neuron

Question 10

Sympathetic Nervous sys nerves

Answer 10

Begins @ lateral horn

pre- Short- ACH nicotinic– Post Ganglionic Long–Alpha, Beta norepinephrine

Question 11

Parasympathetic Nervous sys nerves

Answer 11

Begins @ lateral horn

pre- Long- ACH nicotinic–Post Ganglionic Short–Ach Muscurinic

Question 12

Somatic nervous sys nerves

Answer 12

Begins @ ventral horn

pre— ACH nicotinic receptor– post ganglionic neuron

Question 13

Why aren’t sensory neurons divided into somatic or autonomic?

Answer 13

because they overlap

Question 14

Parasympathetic Division

Answer 14

AKA craniosacral
controls: size of pupil, shape of lens, nasal mucus membrane= & lacrimal & salivary glands, lungs, heart, stomach, pancreas, intestine, liver
Cranio- pre cell bodies come from the brain are located in the brainstem& make up parer of the cell bodies of cranial nerves
Sacral- preganglionic neuron cell bodies are located in the sacral region of the lateral horn of the spinal cord

Question 15

Vagus nerve of parasympathetic division

Answer 15

80% of all parasympathetic fibers are found in the vagus nerve

Question 16

Terminal ganglia

Answer 16

located near or on the effector. AKA autonomic ganglia

Question 17

Collateral ganglia

Answer 17

located near the effector that they innervate

Question 18

4 Routes taken by sympathetic axons traveling from the CNS to their effector organs

Answer 18

1: Pre-axons synapse at sympathetic chain ganglia with post- gray ramus communicants (unmyelinated axons) & reenter spinal nerve– travels to skin & blood vessels of body.
2: Same as 1 but post enters sympathetic nerve & travels to organs of the thoracic cavity
3: Preganglionic neuron does NOT synapse & forms splanchinic nerve to the collateral ganglia- synapse with post– organs, glands vessels of abdominal cavity
4: Same as 3 but instead of synapsing they travel straight through collateral ganglia to the medulla of the adrenal gland to produce epinephrine & norepi.

Question 19

Enteric Nervous sys

Answer 19

3rd division of the brain. innervates the digestive tract from the esophagus to the colon: myenteric & submucosal plexus.
Receive pre fibers from para & post from sympathetic of the ANS to control smooth muscle motor captivity & gut secretions