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LABORATORY SEVEN

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.

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LABORATORY SEVEN

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  1. LABORATORY SEVEN The Neuroendocrine System: Overview

  2. The Neuroendocrine System(homeostasis control) • Nervous system (rapid & transient) • Central • Peripheral • Somatic: voluntary • Autonomic: involuntary • Endocrine system (slow & long lasting)

  3. The Endocrine System Fig 7.2, p119 – only model

  4. Islets of Langerhans Microscopic view of a group of cells in the pancreas that are endocrine in function

  5. 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

  6. Cranial Nerves (When studying the Cranial Nerves model, turn the page 180o) Auditory Spinal

  7. Memory Tool for Learning Cranial Nerves Nerve Name Function Olfactory 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)

  8. Spinal Nerves(both sensory and motor in function) • Cervical (C1-C8) • Thoracic (T1-T12) • Lumbar (L1-L5) • Sacral (S1-S5) • Coccygeal (Co)

  9. 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

  10. 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

  11. 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

  12. 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.

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