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Coordination and response 2, Endocrine system, VS Nervous system, Glands…

- - - - Receptors ( Detect change)
        
        send it to coordinators(BRAIN OR SPINE )
        
        THEY process the information and sends it to the effectors (Muscles or glands)
      - These components of automatic control system (receptors-->coords---> effector) communicate with each other via Nervous or endocrine system)
      - Negative feed back
        
        Response is always opposite of the change (Increase--> decrease)
        
        TOO cold
        
        Skin( Receptors)
        
        Coordinators(BRAIN)
        
        effectors (muscles)
        
        Response( Shivering)
        
        Regulates so to stabilise and optimize the body functions
        
        Relies on negative feedback which detects a change in environment and reverse the change by producing opposite response ( increase--> decrease)
  - - - Demote heat loss
        
        The erector muscles contract
        
        the hair is upright trapping Insulating layer of air
        
        Vasoconstriction: The process carried out in order to demote heat loss and helps in increase in temperature in a colder environment, as result of less blood supply near the skin region by decreasing the diameter of the blood vessel.
        
        shivering
        
        The process of automatic contraction and relaxation of muscles, this requires energy , hence increases the rate of respiration which has heat energy as a waste product which helps in heats up the body.
    - - Vasodilation: The process in which diameter of blood vessels near skin region increases in order to increase blood supply near the skin, therefore promoting heat loss
      - sweating
        
        The heat energy from body is used to evapourate sweat causeing heat loss
      - Erector muscles relax: No need to trap air ; promote heat loss
- - - - Glucose-->glycogen
    - - glycogen--->glucose
- - - - Production of sperms
      - Pubic hair growth
      - Secondary sex characteristics