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Flashcards in Digestion Deck (64)
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1

The physical, chemical and enzymatic means the body uses to render a feed/food ready for absorption

Digestion

2

What controls appetite and food intake?

Hypothalamus (hunger and satiety)
Blood glucose levels
Physical capacity
Environmental temperature

3

What are the three types of digestive processes with examples

Physical/ mechanical (chewing/muscular action of digestive tract)

Chemical (hydrocloric acid denatures proteins/ secretory)

Enzymatic
-proteases, amylase, lipase
-catalyze chemical reactions with proteins
-hydrolysis

4

What are the two types of stomachs?

What digestion does the complex one do?

Monogastrics
Ruminants

Microbial digestion

5

What do the following eat

Carnivore

Omnivore

Herbivore

Eat animal flesh mostly (produce more lysosomes)

Consume plants and animals

Depend on plants for food

6

How animals bring food into their mouth

Prehension

7

This is known as chewing or regurgitating or chewing cud

Poultry rely on grinding action in gizzard for this

Mastication

8

What is the purpose of mastication

To break down smaller particles which increases surface area which makes it more assessable to digestion

9

This is the secretion and mixing of saliva with food

Salivation (salivary glands)

10

What does saliva do

- lubricates

Dissolves

Cleanses

Buffers stomach/rumen acid

11

What is the act of swallowing

Deglutition

12

Food passes down the _______ to the stomach

Esophagus

13

What is the true stomach but also called proventriculus in birds

Abomasum

14

In the glandular stomach also known as _______________, what type of digestion begins and which one is there more of

Abomasum

Enzymatic and chemical digestion

More chemical

15

In ruminants, ______________ occurs first in rumen/reticulum

Fermentation

16

_________________ acid is secreted into the stomach

Hydrochloric

17

What are the three parts of the small intestine?

What does each do

Duodenum- digestion via pancreatic (mostly) and liver secretions

Jejunum- longest portion and major site of ABSORPTION (some digestion)

Ileum: absorption and connects to the large intestine

18

What is the act of expelling fecal matter via rectum or cloaca

Defecation

19

What is urination, components include nitrogenous compounds, minerals and water and is regulated by the kidney

Micturition

20

In micturition, what are the nitrogenous compounds in mammals

Birds

Urea mammals

Uric acid

21

What can monogastrics not use as a source of nutrients

Fiber or
High fiber feed stuff

22

What is the one exception in monogastrics that allow some to digest fiber

Functional cecum

23

What are the roles the stomach plays

Acid secretion
Enzyme production
Food storage
Release of chyme to small intestine

24

Go through the order of the monogastrics stomach

Mouth- esophagus- abomasum- duodenum- jejunem- ileum- cecum- colon- rectum

25

What would a carnivores by more adept at absorbing?

Amino acids in the jejunem

26

What are the specialized parts of a chicken turkey and duck

What do they do

Crop: feed softening and storage

Proventriculus: glandular stomach, acid and enzymes

Gizzard: grinding aided by grit important since birds have no teeth

27

What % of ruminants at birth is rumen, reticulum, omasum?

Abomasum?

30%

70%

28

When is a calf rumen functional and what does it do

7 weeks

Fermentation
Decline in blood glucose
Production of vfas

29

In a mature ruminant what % is the following
Rumen

Reticulum

Omasum

Abomasum

Rumen 80%

Reticulum 5%

Omasum 7%

Abomasum 8%

30

What part of a ruminant is the fermentation vat, microbes synthesize amino acids, b vitamins, microbes become food

How much digestion occurs here

Rumen

60-90%