Chapter 30: Autonomic Nervous System Concentrate Form .

The nervous system is divided into what two systems:

1. The somatic nervous system and the autonomic nervous system

-Both systems include central nervous system and peripheral nervous system components

In both the ANS and somatic systems, the sensory pathway consists of __ neuron coursing from the ___________ to the ______

In both the ANS and somatic systems, the sensory pathway consists of 1 neuron coursing from the receptor to the CNS

In the somatic system, the motor (_________) pathway consists of ___ neuron coursing from the _____ to the ________

In the somatic system, the motor (efferent) pathway consists of 1 neuron coursing from the CNS to the effector

In the ANS, the motor pathway from the CNS involves what neurons?

Pre-ganglionic and post-ganglionic neuron

A ganglion is defined as a collection of _________ cell ________ __________ of the ______

A ganglion is defined as a collection of neuron cell bodies outside of the CNS

Pre-ganglionic Neuron

The neuron that has its cell body in the CNS and courses to the autonomic ganglion

Post-ganglionic neuron

The neuron that has its cell body in the autonomic ganglion and carries the impulse from that ganglion to the effector

Somatic effectors

Skeletal muscles

ANS Effectors

Smooth muscle, cardiac muscle, and glands (endocrine, exocrine)

What effectors are voluntary?

Somatic effectors (skeletal muscles)

What effectors are involuntary?

ANS effectors (smooth muscle, cardiac muscle, and glands- exocrine and endocrine)

Parasympathetic Nervous System

1. _____ or _________

2. Involves CN ___, ____, ___, __ and spinal segments ___-__

3. Its ganglia lie _____ or _______ the ______ organ

4. Long ________________ and short ____________ fibers

5. Stimulus involves only ___ ______ at a time

1. Rest or digest

2. Involves CN III, VII, IX, X and spinal segments S2-4

3. Its ganglia lie near or within the target organ

4. Long preganglionic and short postganglionic fibers

5. Stimulus involves only 1 organ at a time

Sympathetic Nervous System:

1. ______ or ________

2. Involves spinal segments ___-___

3. Its ganglia are located ______ the _____ _______

4. Short ______________ and long _______________ fibers

5. Exhibits _____ _______, where stimulation activates ______ _________ at once

1. Fight or flight

2. Involves spinal segments T1-L2

3. Its ganglia are located near the spinal cord

4. Short preganglionic and long post ganglionic fibers

5. Exhibits unit action, where stimulation activates many organs at once

Parasympathetic Actions:

1. Constrict pupil

2. Stimulates flow of saliva

3. Slows heartbeat

4. Constricts bronchi

5. Stimulates peristalsis and secretion

6. Reproductive organs

Sympathetic Actions:

1. Dilates pupil

2. Inhibits flow of saliva

3. Accelerates heartbeat

4. Dilates bronchi

5. Inhibits peristalsis and secretion

6. Secretion of adrenaline and noradrenaline