A&P 1 Ch. 13 The PNS pt. 2

The large branch of spinal nerves that extend anteriorly come from the _____ Ramus?

Ventral

The Brachial plexus is the intermingling of the _____ ____ of C-5 through C-8 and part of T-1?

Ventral Rami

The ventral rami of T-1 through T-12 form _____ ____ and do not enter a plexus?

Intercostal nerves

Which direction does the Dorsal Ramus extend?

Posteriorly

What is the name of the branch each spinal nerve divides from?

Rami/Ramus

A ____ is a region where multiple ventral Rami meet and intersect?

Plexus

There are ____ pairs of Spinal nerves?

31

How are the 31 nerve pairs broken down? Locations

8 Cervical 12 Thoracic 5 Lumbar 5 Sacral 1 Coccygeal

What areas does the Ventral Ramus serve?

Anterior body tissues of trunks and limbs

The Cervical plexus is formed by the intermingling of ventral rami ___ through ___?

C-1 through C-5

Name the four plexuses we learned about?

Cervical Plexus Brachial Plexus Lumbar Plexus Sacral Plexus

What do Chemoreceptors respond to?

Chemical changes or presence of chemicals

The _____ Ramus serves body tissues on the posterior trunk of the body?

Dorsal

T/F the Brachial plexus is strong, not easily damaged by jerking force or strong blows?

False- Is easily damaged

T/F All spinal nerves are Sensory only?

False- Spinal nerves are mixed

T/F The Lumbar plexus is the intermingling of dorsal rami L-1 through L-4?

False- Ventral Rami

T/F Dorsal rami also from plexuses?

False- do not form plexuses

T/F The dorsal ramus is the long branch?

False- short

T/F Cold receptors are deep?

False- superficial

Photoreceptors respond to ____ energy?

Light

The ____ plexus lies within the anterior of the pelvis?

Lumbar

____are responsive to touch, vibration, pressure, or stretch?

Mechanoreceptors

What are the 5 classifications of receptors by stimulus?

Mechanoreceptors Thermoreceptors Photoreceptors Chemoreceptors Nociceptors

The Dorsal and Ventral Ramus carry ____ and ____ nerves?

Motor Sensory

Receptors that respond to damaged stimuli and cause pain are____?

Nociceptors

Specialized neurons that respond to the outside environment are called_____?

Sensory receptors

The Brachial plexus is located near the meeting of the ____ and the ____?

Shoulder and neck

How can sensory receptors be classified?

Stimulus, Location, or Complexity

Deep heat receptors and superficial cold receptors are both examples of _______?

Thermoreceptors

T/F From plexuses different spinal nerve rami travel together?

True

T/F Spinal nerves are short (less than an inch)?

True

T/F the Cervical plexus is located in the posterior portion of the neck, deep to the sternocheldomastiod muscle?

True