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Feedback Loops, Input, Stress Stimulus: exercise (external stimulus) &…

- - - - Negative Feedback BODY TEMPERATURE
        
        Leads to amplification of homeostatic variable (temperature)
        
        Fall in Temperature
- - - - Stimulus | Effector | Response
- - - - membrane permeability change
      - metabolic pathways
      - equilibrium reaction
- - - - Brain input (signal) & Body system input detection: neurosecretory cell
        
        nerve impulses sent to pituitary (posterior)
        
        Posterior Pituitary Gland stores and releases hormones into the blood
        
        ADH (kidney) & Oxytocin hormones
        
        receives "hypothalamic neurohormones" - control release of Anterior Pituitary Gland hormones
        
        Release of 7 "peptide hormones": E.G growth hormone (HGH), thyroid stimulating hormone (TSH), ACTH "stress hormone" (adrenal glands stimulated), FSH
      - "Connects endocrine system to nervous" - Pituitary Gland
  - - - "Nerve Cells"
        
        Message Transmitters - electrochemical impulses (action potential)
        
        To and from "target tissues"
        
        "peripheral nervous system"
    - - Brain & Spinal Cord
    - - RECEPTOR Organ: eyes, ear, skin, taste buds, stretch and pressure receptors
        
        Transmission of "impulses" to brain (central) from nerve cells - "processes" input and coordinates response
        
        "motor output" - impulses are transmitted by motor neurons to effector
        
        EFFECTORS carry out mechanism in response to stimulus (muscles, organ, gland)
        
        RESPONSE (e.g. sweating, shivering, vasodilation & constriction, breathing rate alter, insulin & glucagon secretion, urine output)
        
        HOMEOSTASIS (cyclic)
        
        Behavioural Response
        
        Physiological Response