Chapter 13 - The Peripheral Nervous System

Question 1

PNS links the —– with the body and the external environment

Answer 1

CNS

Question 2

2 subdivisions of Visceral Motor Division (ANS)

Answer 2

Sympathetic Divison
Parasympathetic Divison

Question 3

Motor neurons carry signals to the —— and —— muscles and glands

Answer 3

Cardiac and Smooth

Question 4

Sympathetic Nervous System described as the ————– response

Answer 4

Fight or flight

Question 5

Parasympathetic Nervous System described as the ————- response

Answer 5

Rest & Digest

Question 6

Sympathetic and Parasympathetic neurons carry signals to viscera

Answer 6

Sympathetic Motor Neuron to heart
Parasympathetic Motor Neuron to Urinary bladder

Question 7

Nerves that attach to the brain; innervate structures of the head & neck

Answer 7

Cranial Nerves

Question 8

Anterior Root carries Efferent information away from the spinal cord. Only contains Axons of —— neurons

Answer 8

Motor

Question 9

Posterior Root carries Afferent information to the spinal cord. Only contains Axons of —– neurons

Answer 9

Sensory

Question 10

The posterior and anterior roots are — street(s)

Answer 10

One-way streets

Question 11

—– —— trunk is what joins the roots and the rami (singular=ramus)

Answer 11

Spinal nerve

Question 12

—— —— carries sensory signals from PNS to spinal cord

Answer 12

Posterior (Dorsal) root

Question 13

—— —— carries somatic and visceral motor signals from CNS to skeletal muscles and gland cells

Answer 13

Anterior (Ventral) root

Question 14

—– —— carries visceral motor, somatic motor, and sensory signals TO AND FROM the spinal cord

Answer 14

Spinal Nerve

Question 15

—– —— carries visceral motor signals from ANS to organs of the ventral body cavity

Answer 15

Ramus Communicans

Question 16

—— ———– carry somatic motor signals from the CNS to skeletal muscles, and sensory signals from sensory receptors in the PNS to spinal cord

Answer 16

Anterior (Ventral) Rami & Posterior (Dorsal) Rami

Question 17

—— Nerve supplies the diaphragm muscle that drives ventilation.
With Axons (C3,C4,C5)

Answer 17

Phrenic Nerve

Question 18

There are 31 pairs of Spinal Nerves

Answer 18

Cervical Nerves (C1-C8)
Thoracic Nerves (T1-T12)
Lumbar Nerves (L1-L5)
Sacral Nerves (S1-S5)
Coccygeal Nerves (Co1)

Question 19

Nerve Plexuses are networks of intersecting nerves that serve specific regions of the body. They are formed by ——

Answer 19

Anterior Rami

Question 20

Four main nerve plexuses

Answer 20

Cervical plexuses (C1-C5)
Brachial plexuses (C5-T1)
Lumbar plexuses (L1-L4)
Sacral plexuses (L4-S4)

Question 21

Major nerve of Cervical plexuses (C1-C5) is

Answer 21

Phrenic nerve

Question 22

3 Major nerves of Brachial plexuses (C5-T1)

Answer 22

Radial Nerve - Innervate thumb
Median Nerve - Innervate middle finger
Ulnar Nerve - Innervate Pinki finger

Question 23

Lumbar plexuses (L1-L4) - Posterior Divison - The largest nerve is

Answer 23

Femoral Nerve (L2-L4)
Hip flexion and Knee extension

Question 24

Sacral plexuses (L4-S4) contain the largest nerve in the body…

Answer 24

Sciatic Nerve (S1-S3) - Innervates gluteus maximus, back of thigh, and lower leg and foot