Digestion Flashcards
What is prehension?
Catching food
What is digestion?
the process of converting complex nutrients into forms that can be absorbed
What is mastication?
Chewing
What two types of digestion are there?
Chemical and microbial
What type of digestion do carnivores have?
Chemical
T/F Carnivores have an 80-90% meat based diet.
True
T/F Omnivores must digest meat and highly digestible plant components.
True
T/F Grains are fruits are hard to digest.
False
What kind of digestion do omnivores have?
Chemical and microbial (species dependent and very limited) digestion
What is an example of a forage or rufage?
Hay, fruit
Low digestible plant components are what?
high fiber and cellulose
What is a herbivore’s PRIMARY type of digestion?
Microbial
A dog, pig, cat, and human have a what tract?
Monogastric
A cow has a what tract?
Ruminant
A horse has a what tract?
Non-ruminant or Hindgut Fermenter
A bird has a what tract?
Modified monogastric
What is the mouth’s purpose?
Mastication, saliva,
What is the esophagus’ purpose?
Transport
What is the stomach’s purpose in a monogastric and non-ruminant?
Chemical digestion
What is the stomach’s purpose in a ruminant?
Microbial digestion
What is the small intestine’s purpose?
Digestion and little absorption
What is the cecum’s purpose in a monogastric and ruminant?
blind pouch
What is the cecum’s purpose in a non-ruminant?
Microbial digestion
What is the large intestine’s purpose in a monogastric, ruminant, non-ruminant, and modified monogastric?
Water absorption
What is the crop’s purpose?
Moistening
What is the proventriculus’ purpose?
Chemical digestion
What is the gizzard’s purpose?
Mastication
What is the cloaca?
3 way hole
What are the four parts of a ruminant’s stomach?
Rumen, reticulum, omasum, and abomasum
What four gastric glands are there?
Mucous cells, parietal cells, chief cells, and G cells
Mucous cells
secrete alkaline mucus that protects the epithelium against shear stress and acid
Parietal cells
secrete hydrochloric acid
Chief cells
secrete pepsinogen (proteolytic enzyme)
G cells
secrete gastrin
Gastric glands are located where?
the stomach
What does the proximal section of the small intestine do?
Chemical digestion
What does the distal section of the small intestine do?
Nutrients absorption
What is the gall bladder?
storage of bile (digestion of fats)
What is pancreatic secretion?
amylase, lipase, protease, bicarbonate
What is amylase?
Complex sugars
What is lipase?
fats
What is protease?
proteins
What is bicarbonate?
HCO3
Amylase turns what into what?
Complex carbohydrates into glucose
Protease turns what into what
Proteins into amino acids
Lipase turns what into what?
Complex lipids into fatty acids
The reticulum has a what patter?
honeycomb
The rumen has a what patter?
papillae
The abomasum has a what pattern?
layers (pages of a book)
The omasum has a what pattern?
Cells!
What gives structure to plants?
lignin
T/F Lignin is easy to digest
False
VFA’s stand for what?
Volatile fatty acids
T/F VFA’s go through the rumen’s papillae to get into the bloodstream
True!
Bacteria turns into what VFA
butyrate
Protozoa turns into what VFA?
propionate
Fungi turns into what VFA?
acetate
In ruminants, the what directs milk to the abomasum?
esophageal groove
What diet helps develop the rumen better?
milk and grain
Cecotrophy/coprotrophy
eating poop :o
Where does fermentation happen in non-ruminants?
large intestine