Unit 4: Control of feed intake in livestock (Cram)

Physiological desire for feed following a period of fasting

Hunger

Learned response to the presence of feed

Appetite

Another term for appetite

Voluntary feed intake (VFI)

Region of the brain that is involved in the regulation of several body functions

Hypothalamus

What are the two centers in the hypothalamus responsible for the expression of appetite?

1. Feeding center

2. Satiety center

What are the two theories that attempt to explain how the hypothalamus tells the animal when to eat?

1. Nutrient concentration theory

2. Body temperature theory

In the nutrient concentration theory of hypothalamus function, what two things does the hypothalamus sense the levels of in the blood?

1. Glucose

2. Amino acids

Term that refers to the overall acceptability of the feed to the animal

Palatability

What are the four things palatability is influenced by?

1. Texture

2. Odour

3. Flavour

4. Visual appearance

Intake of feeds that are higher in fiber is ______ than more digestible feeds

lower

Why do pregnant females need to be fed smaller meals more frequently throughout the day?

Less gut capacity

An animal goes off feed, what is the first thing you suspect

Water supply

Fever or high ambient temperature makes an animal ________ feed intake

decrease