Final Study Guide: Autonomic Nervous System (Ans)

Front 1

Define autonomic nervous system {ANS}:

HINT: C S G

Back 1

consist of the motor nerve fibers that transmit nerve impulses to the
cardiac muscle, smooth muscle, and glands of the body.

Front 2

2 divisions

HINT: S & P

Back 2

sympathetic and parasympathetic.

Front 3

Describe the SYMPATHETIC division in regards the following

HINT: T L G PG NT

Back 3

1. the spinal nerves involved:
involves certain thoracic and certain lumbar spinal nerves.
2. Sympathetic chain of ganglia and collateral ganglia:
site where sympathetic preganglionic and sympathetic postganglionic neurons synapse.
3. locations of preganglionic and postganglionic neurons:
preganglionic neurons run from the spinal cord to the sympathetic chain of ganglia or collateral gangia. postganglionic neurons run from the sympathetic chain of ganglia and collateral gangia to the organ supplied.

4. neurotransmitter substance released at their nerve endings:
nor-epinephrine or sympathin released at the endings of sympathetic nerves.

Front 4

Describe the PARASYMPATHETIC division in regards the following

HINT: C S TG PG NT

Back 4

1. the nerves involved:
involves certain cranial and certain sacral spinal nerves.
2. terminal ganglia:
site where parasympathetic preganglionic and parasympathetic postganglionic neurons synapse.
3. locations of preganglionic and postganglionic neurons:
preganglionic neurons run from the CNS to the terminal ganglia. postganglionic neurons run from the terminal ganglia to the organ supplied.

4. neurotransmitter substance released at their nerve endings:
acetyl choline released at the endings of parasympathetic nerves.

Front 5

Why are sympathetic and parasympathetic nerves described as being ANTAGONISTIC?

Back 5

Because they have opposite effects on each gland. For example, sympathetic nerves to the heart speed up heart rate but parasympathetic nerves slow down the heart rate.

Front 6

3 PARTS of a sensory unit

HINT: S R N N I S

Back 6

stimuli -----> 1 receptor -----> nerves impulses ----- > 2 neural pathway ----- > 3 interpreting center -----> projected back to source.

Front 7

2 senses of the ANS

Back 7

General and Special

Front 8

- touch, pressure, heat, cold, and pain.
- their receptors are widely distributed throughout the body.
- receptors are relatively simple structures.
- the sensory fibers of their neural pathway found in both cranial and spinal nerves.
- do not have separate highly specific neural pathways.

Back 8

General Senses

Front 9

- vision, hearing, equilibrium, smell, and taste.
- their receptors are located only in the head region.
- receptors are complex structures.
- the sensory fibers of their neural pathway found only in cranial nerves.
- they have separate highly specific neural pathways.

Back 9

Special Senses