PHYSIO - PNS

Question 1

Conveys sensory information to the central nervous
system

** (brain and spinal cord)**

and conveys messages
from it to the body’s muscle and glands via cranial
nerves and spinal nerves

Answer 1

PNS

Question 2

Begin at the junction of the dorsal and ventral roots of
the spinal cord leaves the vertebral column and travel
to the muscles or sensory receptors they innervate
branching repeatedly

Answer 2

Spinal Nerves

Question 3

 (“bear toward”) brings
sensory information to the CNS

Answer 3

Afferent axons or neurons

Question 4

 (“bear away from”)
leaves the spinal cord and bring information to
muscles and glands

Answer 4

Efferent axons or neurons

Question 5

Receives sensory information from the sensory
organs and that control movements of the skeletal
muscles

Answer 5

The Somatic Nervous System

Question 6

Concern with regulation of smooth muscles, cardiac
muscles and glands

 Autonomic means “self governing”

Answer 6

The Autonomic Nervous System

Question 7

Division of the ANS

Answer 7

1. Sympathetic
2. PARASYMPATHETIC

Question 8

Most involved in activities associated with expenditure
of energy from reserves that are stored in the body
which includes increased excitement, blood flow,
erection

 Also called “thoracolumbar system” because cell bodies
of its motor neurons are located in the gray
matter of the thoracic and lumbar regions of the spinal
cord

Answer 8

Sympathetic

Question 9

Supports activities that are involved which increases
the body’s supply of stored energy like salivation,
gastric and intestinal motility, secretion of digestive
juices and gastrointestinal system

Also called “Craniosacrial System” because cell bodies
are located on the nuclei of some of the cranial nerves
and intermediate horn of the gray matter in the sacral
region of the spinal cord

Answer 9

Parasympathetic

Question 10

Twelve pairs leave the ventral surface of the brain

 Most of these nerves serve sensory and motor
functions of the head and neck

Answer 10

Cranial nerves