Homeostasis Overview

Descrição

Molecular Biology (Cells, Genetics) (Homeostasis) Mapa Mental sobre Homeostasis Overview, criado por Scott Harvey em 07-11-2018.
Scott Harvey
Mapa Mental por Scott Harvey, atualizado more than 1 year ago
Scott Harvey
Criado por Scott Harvey mais de 5 anos atrás
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Resumo de Recurso

Homeostasis Overview
  1. Negative feedback
    1. Inhibits stimulus
      1. Return to ideal
        1. SET POINT
        2. Maintenance of equilibrium
        3. Change in variable
          1. Detected by receptor
            1. Processed in integration centre
              1. Effector response
                1. Return to....
                  1. Usually activated by autonomic nervous system
                  2. Normally in medulla
                  3. Transmitted by sensory neurones
                2. EXAMPLES
                  1. High blood pressure
                    1. Reduced cardiac output
                      1. Vasodilation
                      2. Hyperglycaemia
                        1. Release of insulin
                    2. Positive feedback
                      1. Enhance stimulus
                        1. Divergence from equilibrium
                        2. EXAMPLES
                          1. Blood clotting
                            1. Platelets at clot release chemical to attract more platelets
                              1. Clot formed
                            2. Childbirth
                              1. Oxytocin released, stimulates contractions
                                1. Contractions stimulate release of more oxytocin
                                  1. Continues until birth
                          2. Keeping vital parameters within narrow limits
                            1. Core body temperature
                              1. Heart rate
                                1. Blood pressure
                                  1. Blood glucose
                                    1. Osmolarity of plasma
                                      1. Urine concentration
                                      2. Rapid and efficient communication around body
                                        1. Nervous system
                                          1. Autonomic
                                            1. Electrical communication
                                            2. Endocrine system
                                              1. Hormones
                                                1. Chemical communication

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