MT - 5: Digestion

Question 1

Topic - 50: Neurohormonal regulation of food intake and gastrintestinal tract

Answer 1

• Intersp, diff in food intake
• Chewing
  Strech receptors/reflexes
  Mechanoreceptors

- Regulation of food intake
Hunger- Lateral nucleus
Aphagia/Hyperphagia
Satiety
Apetite - Amygdala+prefrontal cortex

• Effects of GI Tracts

Hormonal effects
Gastric and intestinal filling
Other effects:
Temperature – high temperature decreases food intake
Estrogen – low estrogen level increases the sensation of hunger
Volemia – hydrated leads to increased food intake, while dehydrated organs do not
Density of the population
Hierarchy Hormonal effects on hunger
Night-day cycle

Question 2

Topic 51_ Food intake, salivary secretion, process of swallowing

Answer 2

• Intersp, diff in food intake
• Chewing
  Strech receptors/reflexes
  Mechanoreceptors

- Regulation of food intake
Hunger- Lateral nucleus
Aphagia/Hyperphagia
Satiety
Apetite - Amygdala+prefrontal corte

• Swallowing (3phases a/b)
• Saliva productions
  Serous/mucous glands
• Salivary secretion
  Primary/secondary
• PH saliva/Blood - Mono gastric animals/Ruminants

Question 3

Topic 52: Motoric activity and electrophysiology of the gastrointestinal tract

Answer 3

RP of each SM cells, of GI tract are different
Theese two cells show a permanent and low activity at which two types can be differentiated:
- Slow waves (BER)
- Spike potentials
- Extrinsic and Intrinsic neural regulations