USMLE step 2 EXAM A+ GRADE ASSURED COMPLETE SOLUTIONS AND VERIFIED ANSWERS LATEST UPDATE!!!!

USMLE EXAM zm




Exam Solution
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ANSC 221 EXAM 2 2026 A+ GRADE ASSURED COMPLET
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E SOLUTIONS AND VERIFIED ANSWERS (4E135)
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QUESTION 1 zm




lips
ANSWER

-most important for animals without hands, prehension (horse), sifting food, swallowing; -
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least important to chicken (no lips, beak) lips of pigs immobile, used for protection
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QUESTION 2 zm




teeth
ANSWER

mastication, particle size reduction -chewing important for ruminant animals-
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more they chew, more HCO3 produced, affects rumen fermentation
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QUESTION 3 zm




tongue
ANSWER

swallowing



QUESTION 4 zm




teeth carnivore
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ANSWER

tearing

,QUESTION 5 zm




teeth omnivore zm




ANSWER

can chew food
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QUESTION 6 zm




teeth pig zm




ANSWER

cheek teeth w cone shaped or rounded cups for crushing food
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QUESTION 7 zm




herbivore teeth zm




ANSWER

only front teeth on bottom and pad on top
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QUESTION 8 zm




saliva
ANSWER

beginning of digestion for non-ruminant animals -
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Mucous: to moisten food and stick it together, lubricate for swallowing -
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Amylase (pytalin in humans): digest carbohydrates -
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Bicarbonate in ruminants: produce large amounts of acid in rumen via fermentation, acid is buffered
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in part from bicarbonate from saliva
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QUESTION 9 zm




esophagus
ANSWER

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connects mouth with stomach, food is moved from mouth to stomach by muscular contraction called
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zmperistalsis -reverse-peristalsis= vomiting, direction of contractions is reversed -
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segmentation: occurs in small intestine; contraction, churning and mixing of food
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QUESTION 10 zm

,stomach
ANSWER

storage chemical digestion
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QUESTION 11 zm




pyloric sphincter
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ANSWER

controls movement of gastric contents between stomach and small intestine
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QUESTION 12 zm




non-ruminant stomach-regions
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ANSWER

4 regions esophageal cardiac fundin pyloric
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QUESTION 13 zm




proventriculous
ANSWER

follows crop, ahead of gizzard stomach like a mammal avian
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QUESTION 14 zm




duodenum
ANSWER

closest to stomach, most active digestion
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QUESTION 15 zm




jejunum
ANSWER

absorption



QUESTION 16 zm

, ileum
ANSWER

absorb B12, anything that wasn't absorbed
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QUESTION 17 zm




large intestine
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ANSWER

food that was not absorbed
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QUESTION 18 zm




colon
ANSWER

storage absorption of water
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QUESTION 19 zm




cecum
ANSWER

bind pouch at junction of small and large intestine non ruminant herbivores (horses, rabbits) provid
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es post-abortive fermentation vat digests cellulose, does not provide protein, results in VFAs
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QUESTION 20 zm




bile
ANSWER

emulsifies fat zm




QUESTION 21 zm




gall bladder
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ANSWER

stores bile zm




QUESTION 22 zm