NEET PG DENTAL EXAM

HISTOLOGY

DIGESTIVE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does the rumen do
A
absorbs water content
B
breaks down fibers
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Rumen microbes digest simple and complex carbohydrates (fiber) and convert them into VFAs. VFAs mainly consist of acetic, propionic and butyric acids and provide 50 to 70 percent of the cow’s energy, see figure 1. Diet can affect the amounts of each VFA microbes produce.

Detailed explanation-2: -Microbial Composition and Fibre Degradation Within the Forage-Fed Rumen. Ruminants do not produce the enzymes involved in fibre digestion but harbour-rich and dense microbial consortia which produce an array of enzymes that digest complex plant polysaccharides.

Detailed explanation-3: -Dietary fibre is needed by the cow to maintain healthy rumen function. Eating fibre stimulates chewing, saliva production and rumination. Saliva contains sodium bicarbonate (more commonly known as baking soda) and phosphate salts which help to buffer the rumen pH, and promote the growth of rumen microbes.

Detailed explanation-4: -Abstract. Ruminant animals digest cellulose via a symbiotic relationship with ruminal microorganisms. Because feedstuffs only remain in the rumen for a short time, the rate of cellulose digestion must be very rapid. This speed is facilitated by rumination, a process that returns food to the mouth to be rechewed.

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