Chapter 10- Control of Feed Intake (Nov 26)

Question 1

feed intake regulation=

Answer 1

the interrelated mechanisms that attempt to regulate energy intake in relation to energy expenditures

Question 2

hunger=

Answer 2

the complex of sensations which compels an animal to obtain food

Question 3

satiety=

Answer 3

the complex of sensations which compels an animal to stop eating

Question 4

palatability=

Answer 4

the degree of readiness with which a particular feed is selected and eaten

Question 5

how do animals discriminate between different foods?

Answer 5

taste buds!
= chemical receptors
- we have them everywhere (mouth, stomach, trachea): they tell us what’s going on

Question 6

what are the 6 basic tastes?

Answer 6

1. bitter
2. sour
3. salty
4. sweet
5. umami (meaty, savoury taste that some foods have)
6. kokumi (mouth feel, hardiness)

Question 7

a different number of taste buds across species changes the ___ across species

Answer 7

perception

Question 8

____, ____, ____, ____ may increase consumption

Answer 8

flavors, odor, sight, texture

Question 9

in terms of texture, animals tend to not like ___ feed

Answer 9

dusty

Question 10

high ___ ___ feed is generally most palatable

Answer 10

nutrient density

Question 11

out on pasture, animals have a choice of plants, but:

Answer 11

• overgrazing= less choice, less feed intake

- new, lush pasture= overconsume (palatability encourages the animal to overeat in the short term)

Question 12

in general, animals eat to meet their \_\_\_ needs, which is determined by:
-
-
-
-

Answer 12

energy

• genetics
• enviro
• behavior (including boredom)
• psychology

Question 13

which 3 things regulated short- term control of feed intake

Answer 13

1. neural receptors and afferent (sensory) neurons
2. humoral factors
   - hormones (messengers carried in blood)
   - metabolites (glucose, free fatty acids, volatile fatty acids in ruminants)
3. gastric distention, contraction

Question 14

the glusostatic theory states

Answer 14

food intake is controlled by blood glucose

Question 15

the aminostatic control theory states

Answer 15

monogastrics have an appetite for a specific amino acid

Question 16

the thermostatic control theory states

Answer 16

animals eat to keep warm

- feed intake decreases in hot weather

Question 17

in terms of long-term control of feed intake, animals seldom __ or ___

Answer 17

starve or overeat (when adequate supplies/ feed available)