lecture_3 - Control Pathways Maintain homeostasis...

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Unformatted text preview: Control Pathways Maintain homeostasis Localparacrines (autocrine ) Long-distancereflex 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 (feedback loop) 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 loop Homeostatic Setpoint Homeostatic range -oscillation around setpoint Change in setpoint Acclimatization Natural ,moving from warmer to cooler Acclimation Lab, adaptation in the lab, in a Control conditiion Biorhythms Acardian ryth , 24hrs 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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