ANIMAL SCIENCE EXAM 3 WITH QUESTIONS
AND ANSWERS|| ALREADY GRADED A+||
GUARANTEED PASS|| LATEST VERSION 2026
What are the 3 portions of the small intestine, and what is the function of each?
- ANSWER-1) duodenum: MOST ACTIVE SITE OF NUTRIENT
DIGESTION, bile and pancreatic secretion enter here
2) jejunum: ONLY SITE OF PROTEIN ABSORPTION, longest portion of
small intestine, major function is the absorption of digestive end products
3) ileum: reabsorb bile and absorb any escaping nutrients, absorption also
occurs here, but its major job is to connect to the large intestine
What does bile do and where does it come from? - ANSWER-formed in the
liver and stored in the gallbladder
assists in the digestion and absorption of fats
What does pancreatic juice do? Describe each enzyme found in pancreatic juice.
- ANSWER-splits a compound into two or more simpler compounds
Digestive enzymes: Proteolytic enzymes: Trypsinogen, Chymotrypsinogen,
Procarboxypeptidase; Carbohydrate enzymes: amylase; Lipid enzymes: Lipase;
Nuclease - Nucleic acids (DNA & RNA)
What is the function of the large intestine? What do bacteria do in the gut of a
mono-gastric herbivore - ANSWER-- water, electrolytes, vitamins, minerals
and volatile fatty acids are absorbed here
- the bacteria grow here and produce gases and some produce vitamins
,Why are VFAs of importance to the ruminant, and what does the animal do with
them? - ANSWER-- produce, absorb, used as an energy source
Name the nutrients produced by rumen fermentation - ANSWER-- produce
VOLATILE FATTY ACIDS
- amino acids
State the advantages of the ruminant digestive system - ANSWER-- digest
feedstuffs that others cannot
- can produce essential nutrients not found in an animals diet
what is genetic correlation - ANSWER-- situation in which same or many of
same genes control two traits
what is positive correlation - ANSWER-- indicates the breeding values of the
animals for the two traits tend to vary together
what is negative correlation - ANSWER-- indicates the breeding values of the
animals for the two traits change in different directions
Define deglution - ANSWER-act of swallowing. passing material from the
mouth through the esophagus to the stomach
What is the role of the stomach in digestion - ANSWER-- chemical and
enzymatic digestion begin
- physical breakdown occurs
- chemical digestion
- stomach also stores food
- STORAGE AND PROCESSING
,~60 % of human diseases are metabolically related - ANSWER-~60 % of
human diseases are metabolically related
Across livestock species, animal diet accounts for ~ 70 % of all production
costs. - ANSWER-Across livestock species, animal diet accounts for ~ 70 % of
all production costs.
What is autoenzymatic digestion? - ANSWER-- monogastrics
- Digestive processes carried out by enzymes that the animal secretes into the
digestive tract (Humans, Pigs, Dogs, Cats, Poultry)
What is alloenzymatic digestion? - ANSWER-- Digestive processes are
accomplished in large part by enzymes produced by microbes inhabiting the
GIT, in addition to animal derived secretions.
(Sheep, Cattle, Rabbit, Horse)
Where might ulcers form? - ANSWER-in the esophageal region of the simple
stomach from excessive acid production of bacteria
what region of the stomach has crypts and folds? - ANSWER-fundic region
what occurs in the fundic region? - ANSWER-- secretes hydrochloric acid
which is produced by the parietal cells
- secretes pepsinogen which is produced by chief cells, converted to pepsin
when combined with HCl
What happens in the pyloric region? - ANSWER-- When disteneded, secretes
the hormone gastrin which stimulates fundic regional secretions
- Raises pH to reduce tissue damage as digesta passes to the small intestine
, - Pyloric sphincter regulates the amount of digesta which passes to the small
intestine, so as not to overload this important area.
what do young monogastrics secrete? - ANSWER-- chymosin (rennin) it clots
milk and prevents immature small intestine from being overwhelmed
what is the primary site of digestion and absorption in swine? - ANSWER-the
small intestine
what is the function of the bile? - ANSWER-emulsify fats & activate pancreatic
lipase
what does the Duodenum mucosal epithelial glands do? - ANSWER-secrete
enzymes that act locally
What is the cecum - ANSWER-little functional significance in the pig;
outgrowth of the large intestine that may slow the rate of passage.
what is the colon - ANSWER-Largest section of LI.
Surface has no villi but instead has columnar epithelial cells called
COLONOCYTES make up 90% of the cells (not enterocytes), many crypts
Primarily water and vitamin absorption
what is the purpose of the rectum - ANSWER-Last section that senses pressure
of the solidified residue and the need for defecation. Serves as a barrier between
a site of absorption and outside offenders
what is the crop in poultry - ANSWER-- modification of esophagus
- Out-pocket of the esophagus
Provides storage for consumed food
AND ANSWERS|| ALREADY GRADED A+||
GUARANTEED PASS|| LATEST VERSION 2026
What are the 3 portions of the small intestine, and what is the function of each?
- ANSWER-1) duodenum: MOST ACTIVE SITE OF NUTRIENT
DIGESTION, bile and pancreatic secretion enter here
2) jejunum: ONLY SITE OF PROTEIN ABSORPTION, longest portion of
small intestine, major function is the absorption of digestive end products
3) ileum: reabsorb bile and absorb any escaping nutrients, absorption also
occurs here, but its major job is to connect to the large intestine
What does bile do and where does it come from? - ANSWER-formed in the
liver and stored in the gallbladder
assists in the digestion and absorption of fats
What does pancreatic juice do? Describe each enzyme found in pancreatic juice.
- ANSWER-splits a compound into two or more simpler compounds
Digestive enzymes: Proteolytic enzymes: Trypsinogen, Chymotrypsinogen,
Procarboxypeptidase; Carbohydrate enzymes: amylase; Lipid enzymes: Lipase;
Nuclease - Nucleic acids (DNA & RNA)
What is the function of the large intestine? What do bacteria do in the gut of a
mono-gastric herbivore - ANSWER-- water, electrolytes, vitamins, minerals
and volatile fatty acids are absorbed here
- the bacteria grow here and produce gases and some produce vitamins
,Why are VFAs of importance to the ruminant, and what does the animal do with
them? - ANSWER-- produce, absorb, used as an energy source
Name the nutrients produced by rumen fermentation - ANSWER-- produce
VOLATILE FATTY ACIDS
- amino acids
State the advantages of the ruminant digestive system - ANSWER-- digest
feedstuffs that others cannot
- can produce essential nutrients not found in an animals diet
what is genetic correlation - ANSWER-- situation in which same or many of
same genes control two traits
what is positive correlation - ANSWER-- indicates the breeding values of the
animals for the two traits tend to vary together
what is negative correlation - ANSWER-- indicates the breeding values of the
animals for the two traits change in different directions
Define deglution - ANSWER-act of swallowing. passing material from the
mouth through the esophagus to the stomach
What is the role of the stomach in digestion - ANSWER-- chemical and
enzymatic digestion begin
- physical breakdown occurs
- chemical digestion
- stomach also stores food
- STORAGE AND PROCESSING
,~60 % of human diseases are metabolically related - ANSWER-~60 % of
human diseases are metabolically related
Across livestock species, animal diet accounts for ~ 70 % of all production
costs. - ANSWER-Across livestock species, animal diet accounts for ~ 70 % of
all production costs.
What is autoenzymatic digestion? - ANSWER-- monogastrics
- Digestive processes carried out by enzymes that the animal secretes into the
digestive tract (Humans, Pigs, Dogs, Cats, Poultry)
What is alloenzymatic digestion? - ANSWER-- Digestive processes are
accomplished in large part by enzymes produced by microbes inhabiting the
GIT, in addition to animal derived secretions.
(Sheep, Cattle, Rabbit, Horse)
Where might ulcers form? - ANSWER-in the esophageal region of the simple
stomach from excessive acid production of bacteria
what region of the stomach has crypts and folds? - ANSWER-fundic region
what occurs in the fundic region? - ANSWER-- secretes hydrochloric acid
which is produced by the parietal cells
- secretes pepsinogen which is produced by chief cells, converted to pepsin
when combined with HCl
What happens in the pyloric region? - ANSWER-- When disteneded, secretes
the hormone gastrin which stimulates fundic regional secretions
- Raises pH to reduce tissue damage as digesta passes to the small intestine
, - Pyloric sphincter regulates the amount of digesta which passes to the small
intestine, so as not to overload this important area.
what do young monogastrics secrete? - ANSWER-- chymosin (rennin) it clots
milk and prevents immature small intestine from being overwhelmed
what is the primary site of digestion and absorption in swine? - ANSWER-the
small intestine
what is the function of the bile? - ANSWER-emulsify fats & activate pancreatic
lipase
what does the Duodenum mucosal epithelial glands do? - ANSWER-secrete
enzymes that act locally
What is the cecum - ANSWER-little functional significance in the pig;
outgrowth of the large intestine that may slow the rate of passage.
what is the colon - ANSWER-Largest section of LI.
Surface has no villi but instead has columnar epithelial cells called
COLONOCYTES make up 90% of the cells (not enterocytes), many crypts
Primarily water and vitamin absorption
what is the purpose of the rectum - ANSWER-Last section that senses pressure
of the solidified residue and the need for defecation. Serves as a barrier between
a site of absorption and outside offenders
what is the crop in poultry - ANSWER-- modification of esophagus
- Out-pocket of the esophagus
Provides storage for consumed food
