Autonomic Nervous System (Star Slides)

Question 1

Sympathetic Nervous System Pathway (Sympathetic Chain)

Answer 1

Starts at Thoracic and Lumbar Spinal Cord

Preganglionic Neuron Leaves at Ventral Horn

Synapses onto Postganglionic Neuron in Sympathetic Chain

Postganglionic Neurons then synapse onto effector organs

Question 2

What is Sympathetic Chain

Answer 2

A column of ganglia that runs parallel to the spinal cord on both sides

Question 3

Sympathetic Nervous System Pathway (Collateral Ganglion)

Answer 3

Starts at Thoracic and Lumbar Spinal Cord

Preganglionic Neuron Leaves at Ventral Horn

Synapses onto Postganglionic Neuron in Collateral Ganglion

Postganglionic Neurons then synapse onto effector organs

Question 4

Sympathetic Nervous System Pathway (Collateral Ganglion)

Answer 4

Starts at Thoracic and Lumbar Spinal Cord

Preganglionic Neuron Leaves at Ventral Horn

Synapses onto Chromaffin Cell directly innervating the Adrenal Medulla

Question 5

Chromaffin Cell

Answer 5

Postganglionic Neuron that is directly innervated by preganglionic neuron to release adrenaline and noradrenaline into the blood

Question 6

White Ramus vs Gray Ramus

Answer 6

White Ramus = Myelinated

Gray Ramus = Not Myelinated

Question 7

How are simultaneous targets innervated

Answer 7

Preganglionic nerves enter a ganglion and can innervate other ganglia above and below its primary target

Question 8

ANS Neurotransmitters (Parasympathetic / Vagus)

Answer 8

CNS –> Stimulates Preganglionic to release ACh –> ACh acts on Nicotinic Receptors on Postganglionic Neurons –> Releases ACh that acts on M2 Receptor –> Inhibitory effect on Muscles/Vessels

Question 9

ANS Neurotransmitters
(Sympathetic Adrenergic)

Answer 9

CNS –> Stimulates Preganglionic to release ACh –> ACh acts on Nicotinic Receptors on Postganglionic Neurons –> Releases NE that acts on alpha/beta Receptors –> Stimulatory effect on Hearts & Vessels

Question 10

ANS Neurotransmitters
(Sympathetic Cholinergic)

Answer 10

CNS –> Stimulates Preganglionic to release ACh –> ACh acts on Nicotinic Receptors on Postganglionic Neurons –> Releases ACh that acts on M Receptors –> Stimulatory effect on Sweat Glands

Question 11

ANS Neurotransmitters
(Sympathetic Dopaminergic)

Answer 11

CNS –> Stimulates Preganglionic to release ACh –> ACh acts on Nicotinic Receptors on Postganglionic Neurons –> Releases D that acts on D1 Receptors –> Stimulatory effect on Renal Vessels

Question 12

ANS Neurotransmitters
(Adrenal)

Answer 12

CNS –> Stimulates Preganglionic to release ACh –> ACh acts on Nicotinic Receptors on Adrenals –> Releases EPI/NE into the blood –> Acts on alpha/beta receptors –> Stimulatory effect on Heart and Vessels

Question 13

ANS Neurotransmitters (Sympathetic Preganglionic Summary)

Answer 13

Releases ACh that acts on Nicotinic

Question 14

ANS Neurotransmitters (Sympathetic Preganglionic Summary)

Question 15

ANS Neurotransmitters (Sympathetic Postganglionic Summary)

Answer 15

Releases NE that acts on alpha/beta (Adrenergic)

Question 16

ANS Neurotransmitters (Adrenal Sympathetic Postganglionic Summary)

Answer 16

Adrenal Gland releases EPI that acts on Effector Organs

Question 17

ANS Neurotransmitters (Parasympathetic Postganglionic Summary)

Answer 17

Release ACh that acts on M receptors