HORMONES Chemical messengers © 2016 Paul Billiet ODWS.

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Presentation transcript:

HORMONES Chemical messengers © 2016 Paul Billiet ODWS

Thyroxin Produced by the thyroid gland It stimulates metabolic rate hence heat output It is also an important growth hormone. © 2016 Paul Billiet ODWS

Leptin Secreted by adipose (fat) tissue It is important in regulating energy balance by suppressing hunger Obese patients seem to be leptin-resistant. © 2016 Paul Billiet ODWS

Leptin and body mass © 2016 Paul Billiet ODWS

Leptin and body mass index © 2016 Paul Billiet ODWS

Melatonin Produced by the pineal gland It regulates the circadian rhythm It has been suggested that it reduces the effects of jet lag It also seems to be a regulator of growth and development Recent work suggests it may be important in the immune system. © 2016 Paul Billiet ODWS