ARPAS Dairy Cattle Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Rumen - CORRECT ANSWER On the left side, 65% of stomach volume equaling 30 gallons at
10-20% DM.
Papillae - CORRECT ANSWER Small finger-like projections that increase absorption surface
area of the rumen. Low energy diets create shorter, high energy longer
Reticulum - CORRECT ANSWER Second compartment of rumen stomach
Omasum - CORRECT ANSWER 3rd stomach compartment. Many layers, absorbs water
Abomasum - CORRECT ANSWER "True stomach"
Displaced abomasum - CORRECT ANSWER Abomasum moves from lower right side to upper
left
How long should cows ruminate per day? - CORRECT ANSWER 8 to 10 hours
How many times should a cud be chewed to indicate adequate fiber? - CORRECT
ANSWER 50
Rumination cycle consists of: - CORRECT ANSWER Regurgitation, rechewing, resalivation,
reswallowing
How much saliva does a cow produce? - CORRECT ANSWER Up to 20 gallons
What causes bloat? - CORRECT ANSWER When a cow cannot eructate (burp) or the gas in the
rumen forms a froth
QUESTIONS AND CORRECT ANSWERS
Rumen - CORRECT ANSWER On the left side, 65% of stomach volume equaling 30 gallons at
10-20% DM.
Papillae - CORRECT ANSWER Small finger-like projections that increase absorption surface
area of the rumen. Low energy diets create shorter, high energy longer
Reticulum - CORRECT ANSWER Second compartment of rumen stomach
Omasum - CORRECT ANSWER 3rd stomach compartment. Many layers, absorbs water
Abomasum - CORRECT ANSWER "True stomach"
Displaced abomasum - CORRECT ANSWER Abomasum moves from lower right side to upper
left
How long should cows ruminate per day? - CORRECT ANSWER 8 to 10 hours
How many times should a cud be chewed to indicate adequate fiber? - CORRECT
ANSWER 50
Rumination cycle consists of: - CORRECT ANSWER Regurgitation, rechewing, resalivation,
reswallowing
How much saliva does a cow produce? - CORRECT ANSWER Up to 20 gallons
What causes bloat? - CORRECT ANSWER When a cow cannot eructate (burp) or the gas in the
rumen forms a froth
