3 - 1 Study sessions for Systems Physiology Instructor: Dr...

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Instructor: Dr Charles Page, Professor Emeritus Dept of Cell Biology and Neuroscience Place, dates and times: ARC- Busch Campus MSLC- Room 336 Wednesdays 11:30 am-12:30 pm Study sessions for Systems Physiology 2
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S TUDY SESSIONS FOR S YSTEMS P HYSIOLOGY Tutor: Smit Shah Dates and Times: Wednesdays - 5:00 pm- 7:00 pm MSLC - Busch Campus Thursdays - 4:00 pm- 6:00 pm Tillett Hall – Learning Center- Livingston Campus Tutor: Dhara Shah Place, Dates and times: Loree Hall Cook/ Douglas Learning Center Mondays - 11:00 am- 12:30 pm Thursdays - 11:00 am- 12:30 pm 3
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Nervous System Endocrine System Complexity More structurally complex; can integrate vast amounts of information & stimulate a wide range of responses Less structurally complex; evolved from the nervous system Structure System of neurons that branch throughout the body Endocrine glands secrete hormones into bloodstream where they are carried to the target organ Communication Neurons conduct electrical signals directly to and from specific targets; allows fine pin- point control; transmission is hormonal : acetylcholine, epinepherin, norepinephrin, etc. Hormones circulate as chemical messengers via the bloodstream; most cells are exposed but only target cells with receptors respond Response Time Fast transmission of nerve impulses up to 100 m/sec May take minutes, hours or days for hormones to be produced, diffuse to target organ, & for response to occur Effect Acts at the cellular level; Immediate and short-lived Acts a the cellular level; Occur over time and are long-lived 5
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NERVOUS SYSTEM GENERAL FUNCTION Sensory Detection Receptors Energy Transduction Mechanical, light, sound, chemical, thermal and others Neural signal Action Potential 6
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Fig. 48.1 O verview: V ertebrate N ervous S ystem 7
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Sensory neurons – convey information about the external & internal environments from sensory receptors to CNS; most synapse with interneurons . Interneurons – integrate sensory input and motor input; located within the CNS; synapse only with other neurons Motor neurons – convey impulses from the CNS to effector cells Three majors classes of neurons 8
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Direction of information flow in the nervous system 9
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NERVOUS SYSTEM GENERAL FUNCTION Information processing: Learning and Memory Intercellular communication in neural circuits Electrical and Chemical events Transmission of information via neural networks Neuronal integration Perception Storage Planning Thought processes and conscious awareness Learning Emotion and Motivation 11
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Three overlap functions of the Nervous System: Sensory input is the conduction of signals from sensory receptors to integration centers of the nervous system. Integration is a process by which information from sensory receptors is interpreted & associated with appropriate responses of the body. Motor output
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3 - 1 Study sessions for Systems Physiology Instructor: Dr...

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