Unit 1

Question 1

Nervous System plays dominant role in

Answer 1

Coordination, associating, integration of body responses to international and external demand

Question 2

Cost of specialization

Answer 2

High
Little capacity to store oxygen or sugar (glucose)
Maintains little mitotic capacity

Question 3

Anatomical Subdivisions

Answer 3

Central Nervous System (CNS)

Peripheral Nervous System (PNS)

Question 4

CNS

Answer 4

Brain & Spinal Cord

Question 5

PNS

Answer 5

12 cranial nerve pairs
31 spinal nerve pairs
Ganglia

Question 6

Functional Subdivisions of NS

Answer 6

Somatic Nervous System

Autonomic (Visceral) Nervous System

Question 7

Somatic NS

Answer 7

Innervates skeletal muscles
Voluntary 
ACH released 
CNS and PNS
Efferent and Afferent nerve fibers

Question 8

Efferent

Answer 8

Exit CNS

Motor

Question 9

Afferent

Answer 9

Arrive at CNS

Sensory

Question 10

Cholinergic

Answer 10

ACH released at target site- excitatory effect on skeletal muscles

Question 11

Autonomic (Visceral) NS

Answer 11

Innervates glands, smooth and cardiac muscles
Involuntary 
CNS and PNS 
Parasympathetic & Sympathetic 
2 efferent neurons

Question 12

Parasympathetic NS (Vegetative)

Answer 12

Cranial Nerves III, VII, IX, X
Sacral Nerves 2, 3, 4
(Cranialsacral subdivision)
Terminal ganglia

Question 13

Sympathetic NS (Fight or Flight)

Answer 13

Thoracolumbar
T1- L2
Collateral ganglia
Adrenergic (NorEpi released by postganglionic neuron)

Question 14

Terminal ganglia

Answer 14

1st neuron communicates with 2nd neuron, usually in/near target organ

Question 15

Collateral ganglia

Answer 15

Communication takes place near CNS (usually sympathetic trunk)

Question 16

PSNS Effects

Answer 16

Slows heart rate, speeds peristalsis, contracts pupil, constricts respiratory tree

Question 17

SNS Effects

Answer 17

Speeds heart rate, decreases peristalsis, dilates pupil, dilates respiratory tree