ANSC 107 Exam 2 Study Guide
Questions and Complete Answers 2026-
2027 Update.
Adaptation - Answer Long term changes in animals in response to their environment
Genetic based
Acclimatization - Answer Adaptation of an animal to environmental factors over a period of
days/weeks
Short term
Conduction - Answer exchange of heat from warm to cold
-Objects touching
Convection - Answer Flow of heat from warm to cold
-Through air or water
Radiation - Answer Exchange of heat between two objects NOT touching.
Can result in loss or gain of heat**
Lower critical temperature - Answer animal has to make physiological adjustments to maintain
its body temp.
-too low
High critical temperature - Answer animal has to make adjustments to try and cool its body
-too high
Effective temperature - Answer the total heating or cooling power of the environment
Homeotherm - Answer Animals that maintain a relatively constant body temperature
regardless of external temperatures
Thermoneutral zone - Answer Animal's comfort zone
-between upper and lower critical temp.
,Thermoneutral zone (TNZ) makes animals - Answer easier to gain weight
Most gain***
Pattern of animal vs. normal temp (inverse): - Answer Larger animal, lower body temperature
Horses normal temp: - Answer 100 F
Cattle normal temp: - Answer 101.5 F
Sheep/Goats normal temp: - Answer 102 F
Swine normal temp: - Answer 102.5 F
Chickens normal temp: - Answer 107 F
Factors affecting critical temp: - Answer -Haircoat
-Subcutaneous fat
-Nutritional level
-Is the animal wet or dry
Thyroxine is produced by - Answer thyroid gland
Thyroxine is produced when - Answer increases during cold stress
decreases during heat stress
Corticoids is produced by - Answer adrenal gland
Corticoids are produced when - Answer increased during cold sorters
decreased during heat stress
The summer is limiting to U.S. livestock except - Answer Brahman cattle
Cheapest and simplest method to reduce heat stress. - Answer Shade
Shade can reduce heat stress by. - Answer 50%
, One of the most effective (but costly$$) ways to reduce heat stress - Answer Evaporative
cooling
Ex: sprinklers, foggers
Most common way to reduce heat stress for swine/farrowing houses (specific zone)? - Answer
Zone cooling
-cools head
Why is refrigeration prohibtive? - Answer terms of cost
-show cattle
When is ventilation used? - Answer used in confinement
Why is ventilation used? - Answer -proper air movement
-reduces disease
-> ammonia, pneumonia
What needs to be removed from air? - Answer Moisture
Ammonia
Air exchange is important for - Answer temperature control
What is used in the North to reduce wind chill? - Answer Windbreakers & Shelter
When animals expend energy to maintian body temperature _______ decreases. - Answer
feed efficency decreases
During heat stress, water intake increases by: - Answer 50-100%
Diets with ________ contribute to heat stress. - Answer high fiber
-> energy to break down
"Top dress rations" (poultry) - Answer Add B vitamins increase appetite (syrup)
Day length effects - Answer reproduction performance
Questions and Complete Answers 2026-
2027 Update.
Adaptation - Answer Long term changes in animals in response to their environment
Genetic based
Acclimatization - Answer Adaptation of an animal to environmental factors over a period of
days/weeks
Short term
Conduction - Answer exchange of heat from warm to cold
-Objects touching
Convection - Answer Flow of heat from warm to cold
-Through air or water
Radiation - Answer Exchange of heat between two objects NOT touching.
Can result in loss or gain of heat**
Lower critical temperature - Answer animal has to make physiological adjustments to maintain
its body temp.
-too low
High critical temperature - Answer animal has to make adjustments to try and cool its body
-too high
Effective temperature - Answer the total heating or cooling power of the environment
Homeotherm - Answer Animals that maintain a relatively constant body temperature
regardless of external temperatures
Thermoneutral zone - Answer Animal's comfort zone
-between upper and lower critical temp.
,Thermoneutral zone (TNZ) makes animals - Answer easier to gain weight
Most gain***
Pattern of animal vs. normal temp (inverse): - Answer Larger animal, lower body temperature
Horses normal temp: - Answer 100 F
Cattle normal temp: - Answer 101.5 F
Sheep/Goats normal temp: - Answer 102 F
Swine normal temp: - Answer 102.5 F
Chickens normal temp: - Answer 107 F
Factors affecting critical temp: - Answer -Haircoat
-Subcutaneous fat
-Nutritional level
-Is the animal wet or dry
Thyroxine is produced by - Answer thyroid gland
Thyroxine is produced when - Answer increases during cold stress
decreases during heat stress
Corticoids is produced by - Answer adrenal gland
Corticoids are produced when - Answer increased during cold sorters
decreased during heat stress
The summer is limiting to U.S. livestock except - Answer Brahman cattle
Cheapest and simplest method to reduce heat stress. - Answer Shade
Shade can reduce heat stress by. - Answer 50%
, One of the most effective (but costly$$) ways to reduce heat stress - Answer Evaporative
cooling
Ex: sprinklers, foggers
Most common way to reduce heat stress for swine/farrowing houses (specific zone)? - Answer
Zone cooling
-cools head
Why is refrigeration prohibtive? - Answer terms of cost
-show cattle
When is ventilation used? - Answer used in confinement
Why is ventilation used? - Answer -proper air movement
-reduces disease
-> ammonia, pneumonia
What needs to be removed from air? - Answer Moisture
Ammonia
Air exchange is important for - Answer temperature control
What is used in the North to reduce wind chill? - Answer Windbreakers & Shelter
When animals expend energy to maintian body temperature _______ decreases. - Answer
feed efficency decreases
During heat stress, water intake increases by: - Answer 50-100%
Diets with ________ contribute to heat stress. - Answer high fiber
-> energy to break down
"Top dress rations" (poultry) - Answer Add B vitamins increase appetite (syrup)
Day length effects - Answer reproduction performance
