how digestion works questions

Question 1

What makes people fat?

Answer 1

changes in lifestyle:
=people are increasingly inactive
2) type of food:
=too much fat

Question 2

What causes severe obesity

Answer 2

genetic predisposition
environmental influences

Question 3

wat are some genetic predispositions

Answer 3

→stimulating appetite
→reducing energy expenditure
→interfering with the normal regulatory
mechanism which matches energy
intake with expenditure

Question 4

wat are some environmental influences

Answer 4

sedentary life, high-fat diet, too much
alcohol…

Question 5

Main components of human energy
expenditure

Answer 5

essential energetic costs of simply
staying alive
2) physical activity
3) thermogenesis

Question 6

Are sloth and gluttony
causes of obesity

Answer 6

Little evidence: activity is almost identical and gluttony is a rare cause of obesity

however: genetic defect may prevent ppl realizing that they have eaten enough

Question 7

wat can dietary fat do

Answer 7

confuse the body’s satiety signals

Question 8

Why do obese people have an
increased appetite

Answer 8

Flow of dietary fat into fat stores is controlled by an enzyme which traps fat globules from the blood stream

active enzyme in people predisposed for obesity = trap excessive amount of fat which become fat cells

= less fat for fuel other tissues = may drive up appetite

Question 9

what is Lipodystrophy

Answer 9

abnormal condition
of the body’s adipose tissue
(thin above waist, skinny below)

Question 10

what does Lipodystrophy prove

Answer 10

fat stores must
be controlling their own size