laboratory seven the neuroendocrine system: overview
TRANSCRIPT
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LABORATORY SEVEN
The Neuroendocrine System: Overview
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The Neuroendocrine System(homeostasis control)
• Nervous system (rapid & transient)
• Central• Peripheral
– Somatic: voluntary– Autonomic: involuntary
• Endocrine system (slow & long lasting)
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The Endocrine System
Fig 7.2, p119 – only model
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Islets of Langerhans
Microscopic view of a group of cells in the pancreas that are endocrine in function
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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
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Cranial Nerves
Auditory
Spinal
(When studying the Cranial Nerves model, turn the
page 180o)
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Memory Tool for Learning Cranial Nerves
Nerve Name FunctionOlfactory nerve I On Some (sensory)Optic nerve II Old Say (sensory)Oculomotor nerve III Olympus’ Marry (motor)Trochlear nerve IV Towering Money (motor)Trigeminal nerve V Top But (both S & M)Abducens nerve VI A My (motor)Facial nerve VII Finn Brother (both)Auditory nerve VIII And Says (sensory)Glossopharygeal nerve IX German Big (both)Vagus nerve X Viewed Brains (both)Spinal Accessory nerve XI Some Matter (motor)Hypoglossal nerve XII Hops More (motor)
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Spinal Nerves(both sensory and motor
in function)
• Cervical (C1-C8)• Thoracic (T1-T12)• Lumbar (L1-L5) • Sacral (S1-S5)• Coccygeal (Co)
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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
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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
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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
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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.