Fourageergedrag en vergelijkende darmmorfologie - Zoo Chptr 32: Digestion and nutrition

6 important questions on Fourageergedrag en vergelijkende darmmorfologie - Zoo Chptr 32: Digestion and nutrition

What are the three methods of feeding on particulate matter?

suspension-feeding, filter-feeding and deposit feeding.

What is filter feeding and deposit feeding?

Filter feeding is a form of suspensionfeeding whereby food is filtered from the water as it passes through.

Depositfeeding is feeding from deposits of disintegrated organic material that accumulates on and in the substratum.

 

What three cell types are there in the stomache glands and what do they secrete?

Goblet cells -> mucus

Chief cells -> pepsinogen (precurser of pepsin which is a protease (protein splitting enzyme)

Parietal/oxyntic cells -> hydrochloric acid

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What two secretions are admitted into the duodenum?

pancreatic juice and bile (water, bilesalts and pigments), both high in bicarbonate content.

Where does bile come from and stored?

The liver secretes bile into the bileduct which drains into the duodenum. It is stored in the galbladder between meals and is sreleased by presence of fatty foods.

What membrane enzymes are found in the microvillus membranes?

Aminopepsidase, disaccharidases (12carbon sugars into 6carbon sugars) such as maltase (maltose into two molecules of glucose), sucrase (splits sucrose into fructose and glucose) and lactase (lactose into glucose and galactose). Alkaline phosphatase and nucleotidases and nucleosidases.

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