thermoregulation

[Joker88]

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EK Bio says that the hair on your skin becomes erect when stimulated by the sympathetic nervous system. Is this the systems way of trying to retain heat in a cold environment?

EK Bio, Page 169: "water and salts are excreted through the skin. This water loss occurs by diffusion through the skin and is independent of sweating"

So there are special channels for sweat glands but we still lose water to our surroundings by other means. What role does salt play in the sweat glands? I thought the skin was impermeable to water so what causes us to lose water from our skin from anything other than our sweat glands?

 

[Joker88]

anyone?

 

[infid3l]

EK Bio says that the hair on your skin becomes erect when stimulated by the sympathetic nervous system. Is this the systems way of trying to retain heat in a cold environment?

EK Bio, Page 169: "water and salts are excreted through the skin. This water loss occurs by diffusion through the skin and is independent of sweating"

So there are special channels for sweat glands but we still lose water to our surroundings by other means. What role does salt play in the sweat glands? I thought the skin was impermeable to water so what causes us to lose water from our skin from anything other than our sweat glands?

Hair becoming erect or piloerection is caused by sympathetic NS in response to cold as the hair trap air which acts as an insulator for heat exchange.

and i am not sure about salts but this is what I found on wiki for insensible water loss http://en.wikipedia.org/wiki/Transepidermal_water_loss