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lecture_3 - Control Pathways • Maintain homeostasis •...

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Unformatted text preview: Control Pathways • Maintain homeostasis • Local–paracrines • Long-distance–reflex control – Nervous – Endocrine – Cytokines Control Pathways Figure 6-22: Comparison of local and reflex control Reflex Control • Stimulus • Sensory receptor • Afferent path • Integration center • Efferent path • Effector- target cell/tissue Response Figure 6-23: Steps of a reflex Types of Receptors: Membrane, CNS & Peripheral Figure 6-24: Multiple meanings of the word receptor Fig. 6-25: Response Homeostatic Setpoint • Homeostatic range -oscillation around setpoint • Change in setpoint – Acclimatization Figure 6-26: Oscillation around the setpoint Figure 6-29 – Circadian rhythms • Negative: are homeostatic – Response slows stimulation – Return to optimal range • Positive: stimulation drives more stimulation • Feed forward: prepares body for change Feedback Loops Feedback Loops Figure 6-27: Negative and positive feedback Feedback Loops Figure 6-28: A positive feedback loop Control systems vary:...
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lecture_3 - Control Pathways • Maintain homeostasis •...

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