Gastrointestinal Physiology

Question 1

What receptors does gastrin produced by the G-cells act upon?

Answer 1

CCK2

Question 2

What receptors on ECL cells does gastrin act upon?

Answer 2

H2 receptors

Question 3

What three factors are required for the maximum amount of HCL secretion to occur?

Answer 3

gastrin
acetylcholine
Histamine

Question 4

What two enzymes are essential for the digestion of fats?

Answer 4

Lipase and bile salts

Question 5

The visible components that will occur in rumination

Answer 5

1. Inspiration against a closed glottis- the oesophagus will visibly contract
2. Food is sucked into the mouth and will move upwards via a process of anti-peristalsis, we will be able to see the bolus moving up
3. The goat then pushes the bolus up against the top of the mouth and the liquid will be re-digested
4. Goat will be chewing the food and adding saliva, the bolus will then be re-digested we will be able to see it travelling down the oesophagus (oesophagus is positioned on the left side, the animal will lift it’s head)