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Nervous System of Luella Screenshot_2021-06-19-17-14-28-1 - Coggle Diagram

- - - - HEART;
        slows down: cardiac and respiratory activity
      - allows restorative processes to quietly and peacefully occur
      - heartbeat rate and force decreases
      - reduce blood supply to cardiac muscle by constriction of the coronary artery
      - blood vessels has no effect on skeletal muscles
      - EYES: contraction of circular muscles of the iris, now that she is calm and in class, causing pupil constriction. Near vision due to contraction of the ciliary muscle.
      - When she arrived at college;
        
        In the long term, the hypothalamus stimulates the anterior pituitary gland
        
        The hypothalamus secrets Corticotropin-releasing hormone, this stimulates the anterior pituitary gland to secrete adrenocorticotropic hormone, stimulates the adrenal cortex.
        
        Glucocorticoid and mineralocorticoid are then released into the bloodstream. Which will then increase the levels of glucose in the blood volume in the blood pressure
        
        Eventually gets negative feedback to her pituitary gland
    - - "fight or flight" prepared her body in the stressful situation example: strengthened her body defenses in time of danger
        
        mouth gets dry
        
        muscles tense for action
        
        myocardial contractility increases
        
        breathing faster
      - During the immediate response to stress adrenaline and noradrenalin are produced by the adrenal glands and by the sympathetic nerves
        
        Hormones act as neurotransmitters when target organs are reached in the sympathetic nervous system
        
        secreted by the adrenal medulla
      - mobilises her body for fight or flight through this stimulation
      - effects of stimulation on the heart, blood vessels and lungs enable the body to respond by preparing it for exercise.
      - oxygen and energy requirements of the skeletal muscles are greatly increased when running away from danger
      - these changes in her body enable a quick response to meet the increase of energy, the body demands.
      - EYES
      - pupil dilation by contraction of radiating muscles of Luella's iris
      - she becomes alert as the dog appears, causing retraction of the levator palpebrae muscles, opening Luella's eyes widely.
      - ciliary muscles slightly relaxed. giving her distant vision
      - MOUTH
      - the superior cervical ganglion controls production of saliva
      - results in the release of noradrenaline
      - which then acts upon alpha and beta adrenergic receptors
      - resulting in a decreased saliva production by acinar cells