Week 3 Lec 17 - Autonomic Flashcards
What is another name for this division - there should be two answers: one is anatomical the other is functional
Sympathetic Division: Functional Name: Fight-or-flight System
Parasympathetic Division:
Functional Name: Rest-and-Digest System
Where are the pre- and postganglionic cell bodies? In a general sense.
Preganglionic neurons have cells bodies in the CNS, usually in the brainstem or spinal cord.
Postganglionic neurons have cell bodies in the periphery
Where are the pre- and postganlionic cell bodies in sympathetic division?
Sympathetic division:
Preganglionic cell bodies: lateral horns of the spinal cord running from T1 to L2
Postganglionic Cell bodies: distributed along the vertebral column
Where are the pre- and postganglionic cell bodies in parasympathetic division?
Preganglionic cell: Found in the brainstem
Postganglionic cell: Located near the targeted organs
Where are the ganglia located (relative to the spinal cord or target organ, near or far)?
Where would you find autonomic ganglia? (sympathetic and parasympathetic)
Sympathetic:
- Sympathetic chain (trunk) ganglia
- Prevertebral (collateral) ganglia
- Adrenal gland (medullae)
What is the effector organs in somatic, sympathetic, and parasympathetic?
Somatic: Skeletal muscle
Sympathetic: Smooth muscle, glands, and cardiac muscles
Parasympathetic: Smooth muscle, glands, and cardiac muscles
What neurotransmitter is used at the effector organs?
Somatic: Acetylcholine
sympathetic: Acetylcholine in ganglion AND Norepinephrine
Parasympathetic: Acetylcholine for Ganglion and another one
How many (in series) neurons from the CNS to the effector organ?
Somatic: 1 neuron
Sympathetic: 2 neuron
Para-sympatheticL 2
Where does the first autonomic neuron synapse with the second? (Sympathetic and Parasympathetic)
Sympathetic: chain ganglia running alongside the vertebral column
Parasympathetic: Close to target organs as opposed to sympathetic
What NT is released by the preganglionic Neuron synapse with the second?
Sympathetic: acetylcholine from the preganglionic neuron and Norepinephrine from postganglionic neuron
Parasympathetic: Acetylcholine form preganglionic neuron only and post
Relatively which is longer? Preganglionic axon or postganglionic axon? (Sympathetic and Parasympathetic)
Sympathetic Division: Postganglionic
Parasympathetic: Preganglionic
Relatively, how close is the ganglion to the CNS (closer, farther)?
Sympathetic: Close to CNS
Parasympathetic: Far
Does gut function increase or decrease due to activation of this division? (Sym and Para
Sympathetic: No (Decreases)
Parasympathetic: Yes (Increases)
Does cardiac function increase or decrease due to activation of this division?
Sympathetic; Yes (increase)
Parasympathetic: No (decreases)
