There are many factors that affect a person's metabolism. A short list would include: age, gender, diet, activity level.
As you age your metabolism can very easily go haywire.
there not
Intelligence
It affects everything
Gender, age and body size and type
A person's metabolism is expected to drop 3-5% for each decade lived.
no.
cystic fibrosis ;)
it effects the persons sense of self.
it affects your metabolism and can give you mental problems as well as physical problems
Down syndrome mainly affects the persons physical features but it also affects their learning abilities.
Genes do play a role and have an effect on metabolism. For example if a persons family has many incidences of obesity, it is highly likely that person will also be obese because their genes will cause their metabolism to be slow.