LABORATORY SEVEN
The Neuroendocrine System:
Overview
The Neuroendocrine System
(homeostasis control)
• Nervous system (rapid &
transient)
• Central
• Peripheral
– Somatic: voluntary
– Autonomic: involuntary
• Endocrine system (slow &
long lasting)
The Endocrine System
Fig 7.2, p119 –
only model
Islets of Langerhans
Microscopic view of a group of cells in the pancreas that
are endocrine in function
The Peripheral Nervous System
• Cranial Nerves - 12 pairs
–
–
–
–
Sensory (afferent) - carry impulses toward the CNS
Motor (efferent) - carry impulses away from the CNS
Mixed (both sensory & motor in a nerve bundle)
Located inferiorly, numbered in order, anterior to
posterior
• Spinal Nerves - 31 pairs
– Mixed
– Numbered based on the name and number of their
associated vertebrae
Cranial Nerves
(When studying the
Cranial Nerves
model, turn the
page 180o)
Auditory
Spinal
Memory Tool for Learning
Cranial Nerves
Nerve
Olfactory nerve I
Optic nerve II
Oculomotor nerve III
Trochlear nerve IV
Trigeminal nerve V
Abducens nerve VI
Facial nerve VII
Auditory nerve VIII
Glossopharygeal nerve IX
Vagus nerve X
Spinal Accessory nerve XI
Hypoglossal nerve XII
Name
On
Old
Olympus’
Towering
Top
A
Finn
And
German
Viewed
Some
Hops
Function
Some (sensory)
Say (sensory)
Marry (motor)
Money (motor)
But (both S & M)
My (motor)
Brother (both)
Says (sensory)
Big (both)
Brains (both)
Matter (motor)
More (motor)
Spinal Nerves
(both sensory and motor
in function)
•
•
•
•
•
Cervical (C1-C8)
Thoracic (T1-T12)
Lumbar (L1-L5)
Sacral (S1-S5)
Coccygeal (Co)
Plexuses
Collection of nerves that
innervates a specific
region of the body:
• Cervical: head & neck,
diaphragm
• Brachial: upper limb
• Lumbar: anterior thigh
• Sacral: buttocks, lower
limb, and pelvis
The Autonomic Nervous System
• Sympathetic: fight-or-flight
– Increases the heart rate, blood
pressure, breathing rate, sweat gland
activity
• Parasympathetic: rest-and-repose
– Lowers the heart rate and blood
pressure
Biopac Setup for Lie Detection
(7A Procedure, p118)
• To test the function of autonomic nervous system
• Measure sympathetic response and subsequent
release of adrenal gland hormones
– Galvanic skin response will be analyzed only
• measures an increase in electrical conductivity of skin
following excess sweat and ions contained therein
• Class should be quiet!
• Write down your answers in your laboratory
report, Tables 7.1-7.3, p124 & 125
Lab Report 7
• Fig 7.1, p123
– Sympathetic and parasympathetic nervous
system control the same organs with opposite
effects
– Go to your text book and look where the
nerves are coming off of the CNS, not the
tissue they stimulate
• Let’s answer Q79-82, p126, in the class.