Eating behaviours - Neural and hormonal

Question 1

Hypothalamus

Answer 1

regulates glucose / homeostasis (maintain constant internal environment) – dual centre model // (HYP) triggers release of insulin / glucagon from pancreas​

Question 2

Dual centre model

Answer 2

Low glucose detected by liver – LH stimulated / releases NPY – hunger stimulant promotes eating – increase in glucose – Liver detects glycogen – stimulates VMH – sense of satiety – stops eating. ​

Question 3

Hetherington and Ranson

Answer 3

Lesioning rats VMH = hyperphagic – overeat – no satiety.

Question 4

Ghrelin

Answer 4

hormone secreted by the stomach (appetite stimulant) secreted when stomach is empty – arcuate nucleus in hyp detects it. LH then secretes NPY. ​

Question 5

Leptin

Answer 5

hormone produced by adipose (fat cells) increases alongside increase in fat cells in blood (excess from eating) detected by VMH – appetite suppressant.​

Question 6

Lincinio

Answer 6

people cannot produce Leptin study – leptin replacement therapy – 18m 40% loss of weight / 49% decrease in food intake. ​

Question 7

AO3

Answer 7

S - Supporting research
- practical application
W - Reductionist
- Oversimplified