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Hormones and Nervous System - Animal R, Adrenocorticotropic hormone, (Can…

- - - - Nervous Response
        
        Chemoreceptors detect low CO2 levels (In carotid artery or body + aorta)
        
        Signals to medulla oblongata the change (cardio stimulatory centre)
        
        Medulla oblongata sends less frequent electrical impulses down the "Decelerator nerve" or Vagus Nerve/Parasympathetic to the SA node, therefore decreasing heart rate (bpm)
      - Hormones
        
        Releases acetylcholine to slow down the heart rate
    - - Nervous Response
        
        Chemoreceptors detect high CO2 levels (In carotid artery or body + aorta)
        
        Signal to medulla oblongata the change (Cardio inhibitory centre)
        
        Medulla oblongata sends electrical impulse down "Accelerator neve" or the Sympathetic nerve
        
        SA node receives more frequent impulses therefore increasing Heart Rate (bpm)
      - Hormones
        
        Hypothalamus activates sympathetic NS
        
        Activates the adrenal medulla
        
        Releases Noradrenaline and adrenaline into bloodstream
        
        Adrenal Cortical system
        
        Hypothalamus releases CRF
        
        CRF received by pituitary gland, produces ACTH from anterior pituitary to adrenal cortex
        
        Adrenal cortex releases around 30 hormones e.g cortisol into bloodstream