Peripheral Nervous System/Somatic and Autonomic Nervous System

What are the 3 major components of the peripheral nervous system ?i i

1. Sensory receptors

2. Peripheral nerves

3. Effectors

How many pairs of cranial nerves are there and what do they supply ?i i

12 pairs of cranial nerves that supply the head and neck .i i

How many pairs of spinal nerves are there and what do they contain ?i i

31 pairs of spinal nerves with each containing sensory and motor neurons .i i

What is each nerve formed from ?i i

Each nerve is formed from the combination of a dorsal and ventral nerve root .i i

Where do dorsal and ventral nerve roots come from ?i i

Dorsal and ventral nerves come directly from the spinal cord .i i

Which nerve root contains a ganglion ?i i

The dorsal nerve root .i i

What is a ganglion ?i i

A ganglion is a swelling that contains the cell bodies of all the sensory neurons entering the spinal cord .i i

Is the dorsal root found at the front or back part of the spinal cord ?i i

Back of the spinar cord .i i

Is the ventral root found at the front or back of the spinal cord ?i i

Front of the spinal cord .i i

Which neuron is found in the dorsal root .i i

The sensory neuron .i i

Which neuron is found in the ventral root ?i i

The motor neuron .i i

The dorsal and ventral root join to form a ___ ___ .i i

Spinal nerve .i i

Where do cranial nerves come from ?i i

Cranial nerves come directly from the base of the brain .i i

The peripheral nervous system is divided into what 2 systems ?i i

1. Somatic nervous system

2. Autonomic nervous system

What is the somatic nervous system made up of (6) ?i i

The SMS is made up of peripheral nerves that connect the centeal nervous system to the skeletal muscles, skin and sense organs, and controls voluntary body movements .i i

What does the autonomic nervous system do ?i i

The autonomic nervous system supplies the involuntary parts of the body such as glands, cardiac muscle, and smooth muscle of the organs .i i

What type of neurons make up the autonomic nervous system ?i i

The AMS is made up of only motor neurons .i i

What are the 2 parts of the autonomic system ?i i

1. Parasympathetic nervous system

2. Sympathetic nervous system

What is the parasympathetic NS also called ?i i

The rest and digest response .i i

What does the parasympathetic NS do (5) ?i i

1. Restores energy

2. Slows down heart rate

3. Decrease blood pressure

4. Promotes digestion

5. Decelerates the body

What is the sympathetic NS also called ?i i

The flight or flight response .i i

When does the body use the sympathetic NS ?i i

In stressful situations .i i

What does the sympathetic NS do (4) ?i i

1. Excited the nervous system

2. Increase blood pressure

3. Increase heart rate

4. Slows down digestion

List 4 things about the vagus nerve

(What nerve, involved in what, called what and why) .i i

1. Cranial nerve #10

2. Involved in parasympathetic NS

3. Involved in controlling involuntary functions like heart rate, digestion, and the immune system

4. Called the “wandering” nerve as it travels from the brain to large intestine

How many pairs of spinal cord divisions are in the cervical region (neck and upper back) ?i i

8 pairs i.i

How many pairs of spinal cord divisions are in the thoracic region (chest) ?i i

12 pairs i.i

How many pairs of spinal cord divisions are in the lumbar region (mid-low back) ?i i

5 pairs .i i

How many pairs of spinal cord divisions are in the sacral region (low back) ?i i

5 pairs .i i

How many coccygeal pairs are in the very low back region ?i i

1 coccygeal pair .i i

How many spinal cord divisions are there in total ?i i

31 pairs .i i

How many spinal nerves are there in total ?i i

31 pairs .i i