Rumen SDL Flashcards
What is the function of bacteria in the rumen?
digest cellulose, fibre, starch and proteins
Synthesise vitamins B and K
Produce VFAs
What is the function of protozoa in the rumen?
digest fibre, plant material, lipids and proteins
synthesise long chain fatty acids
What is the function of fungi in the rumen?
secrete active fibre-degrading enzymes to assist in breakdown of fibrous products
What is the function of archaea in the rumen?
remove hydrogen produced by carb fermentation via methanogenesis
What system is used to assess if a cow has been eating?
Rumen fill test
Measure flank
Describe ruticuloreumen motility
Primary contractions (A waves) - originate in reticulum and pass caudally around rumen
Secondary contractions (B waves) - only in parts of rumen associated with eructation
What does saliva contain?
water
proteins
amylase
Na, Cl, K
Bicarbonate
How is the SI epithelium regenerated?
Epithelial stem cells at base of crypts continuously divide, and migrate upwards and onto the villi, these are lost at the villus tip due to apoptosis and detachment from matrix (anoikis)
Which nerves supply most of the parasympathetic supply to the GIT?
dorsal and ventral vagus
Why does right-sided aortic anomaly cause megaoesophagys?
The ductus arteriosus has to be longer to connect the pulmonary artery to the aorta. Thus the ligamentum arteriosum is longer. The position of the R aorta means that the lig. Arteriosum crosses over the oesophagus, trapping it and compromising its function.
