ANS 150 Exam 1

Animal Importance, Animal Behavior, and Digestive Physiology and Practical Nutrition

What is the average number of calories a person needs every day?

2350

How many grams of protein does an average person need every day?

50

What makes a country developed?

Meets both the total calories and total protein requirements

What makes a country developing?

Meets one of the nutritional requirements

What makes a country underdeveloped?

Does not meet either of the nutritional requirements

List three things related to the nutrient intake of the "average person" in a country when its socioeconomic status goes from being underdeveloped to being developed.

Total caloric and protein intake increases and the proportion of nutrients from animal sources increases

What happened to WHO's estimates of undernourished people from 2005 through this past year?

Although the number of undernourished people fluctuated throughout the years, there was no net change from 2005 through 2020

On a worldwide basis, what do most people eat to meet their protein needs?

Cereals

What research projects were mice used for?

Cystic fibrosis and breast cancer

What research projects were pigs at NCSU used for?

Retinitis pigmentosa, diabetes, stroke prevention, and human infant milk formula

What is economic income factor?

Estimates the economic value of businesses that are needed to support production

When is someone considered to be in a food desert?

They live more than a mile away from a grocery store without transportation

What is gross domestic income?

The total income generated in an economy by the production of final goods and services during a particular period

Which food animals have the most gross domestic income?

Cattle and calves

What two basic criteria define animal behaviors?

behavioral mechanism and biological need

What is a biological need?

what the animal gains from the behavior

What is a behavioral mechanism?

how an animal knows or learns to perform a specific behavior

What is the future income tren for companion animals?

Expected to have 7-10% yearly growth and increase in high-end products and services such as home delivery services and pet superstores

What is the future income tren for food and fiber animals?

Depends on the difference between population and production, whether a country can send these products to areas that need them and can pay for them

Why do we study animal behavior?

They provide signals related to animal well being, biological changes, and management conditions

What are the animal behavioral mechanisms?

Instinct, habituation, conditioning, trial and error, reasoning, and imprinting

What is the instinct mechanism?

behaviors that are inherently present at birth, controlled by biological changes in animals, also called reflexes

Instinct mechanism example?

When females become sexually receptive, the males naturally react

What is the imprinting mechanism?

Young animals bonding with their caretaker, chemicals and/or other signals are involved, partly instinctive, partly learned

Imprinting mechanism example?

A calf immediately connecting with it’s mother

What is a habituation mechanism?

lack of response to repeated stimulus, learned behavior

Habituation mechanism example?

Squirrels in urban areas become use to people and do not run

What is the conditioning mechanism?

association between a behavioral response and a given stimulus, stimulus can be positive or negative, another animal can provide the stimulus

Conditioning mechanism example?

Dogs beginning to associate the doorbell with people coming into the house

What is the trial and error mechanism?

trying various responses to a stimulus until a reward is given, animal seeks out stimulus

What is the most common way behaviors are learned?

trial and error

Trial and error mechanism example?

Chickens searching for food in different locations until they find it

What is the reasoning mechanism?

ability to respond correctly to a stimulus the first time it is applied

Reasoning mechanism example?

Elephants wanted to get inside an electrified fence so they pushed a tree on top of it

What are the biological needs?

Sexual, caregiving, care soliciting, agnostic/social, and feeding

What is a sexual behavior?

concerns the propagation of species, broadcasts sexual receptivity, prepares for birth and lactation, and includes pheromones

Sexual behavior example?

chemicals being emitted in the air which indicate sexual receptivity

What are caregiving behaviors?

originates from parents, involves protection, nourishment, and training young

Caregiving behavior example?

deer keeping their babies hidden while they explore new places

What is a care soliciting behavior?

originates from young and injured or disabled mature animals, signifies assistance

Care soliciting behavior example?

A baby calling out to its mom when its lost

What is an agnostic behavior?

behaviors associated with the fight or flight syndrome, social hierarchy, and interactions with other animals

Agnostic behavior example?

A puppy playing with other animals

What is a feeding behavior?

associated with obtaining food, most common in predation or foraging animals in order to meet nutrient needs

Feed behavior example?

Cows grazing or wolves hunting

How do you classify behaviors?

by mechanism then biological need

What is the anatomical approach to intelligence?

the correlation between intelligence and brain weight to body weight ratio

What is the vocal approach to intelligence?

the more/complex vocalization = smarter

What is the learning rate approach to intelligence?

comparing learning rates of species exposed to the same task or test

How do behaviorists view learning.

as a dynamic process that is continuous

What is ethology?

the study of behavioral science, attempts to classify how animals respond to various situations

What’s the biggest problem with studying animal behavior?

humans often interpret situations and responses of animals with human biases

What are the two ways to classify animals digestively?

digestive anatomy and food preferences

Monogastric examples

humans, pigs, rabbits, horses, and birds

Ruminant examples

cattle, sheep, goats, and deer

What are cereals?

the seed portion of plants, usually high energy with low fiber and no cellulose

What are rhouages or forages?

usually the leaves or stems of plants, low energy with high fiber and contains cellulose/lignin

What is digestion?

the process by which feed particles are reduced to molecules so that they can enter the body

What are the three modes of digestion?

mechanical, chemical, and enzymatic

What is mechanical digestion?

chewing and breakdown of food

What is chemical digestion?

acidic breakdown of food

What is enzymatic digestion?

biological cleavage of food

What is absorption?

process by which molecules are transported from the digestive tract, through intestinal cells, and enter the vascular or lymph systems

What are the two types of absorption?

passive diffusion and active transport

What is passive diffusion?

molecules enter body without the expenditure of energy

What is active transport?

molecules are transported into the body against a concentration gradient which requires energy

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Approximately _____ of family units in the U.S. have at least one pet.

62%

Human health industry primarily uses animals in 2 ways:

research and therapy

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Homeopathy:

natural or alternative treatment of medical problems (like acupuncture instead of drugs)

Retrospective Studies:

the variable of interest occurs before the population is assigned to groups or treatments

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Prospective studies:

the population is assigned to groups or treatments first and then the variable of interest is measured

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Two common ways to evaluate economic importance are...

gross income generated and economic impact factor

Future trends for companion animals project _____ yearly growth

7-10%

What is a strength of measuring intelligence through vocalizations?

It's innate and not something that can be manipulated by humans

What is a weakness to using vocalizations to measure intelligence?

Prey are less inclined to speak than predators due to risk of being hunted

Comparison of learning strength

Animals have to learn the same challenge

Comparison of learning weakness

We assume all test participants value the reward for completing the challenge the same. Predators are also programmed to hunt while prey are programmed to hide

When an animal learns via conditioning, the process is as follows:

acquisition (reinforcement), extinction, spontaneous recovery

Anthropomorphism

giving inanimate objects human qualities

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Monogastrics

stomach has one compartment

What’s unique about ruminants?

Stomach has four compartments

Classify each animal by digestive anatomy and food preference.

• Dog

• Pig

• Horse

• Cattle

monogastric carnivore, monogastric omnivore, monogastric herbivore, ruminant herbivore

What happens in the mouth?

Mechanical reduction of feed/particle size by chewing. Saliva of some species contains amylase (enzymatic)

What does the esophagus do?

Transports food from mouth to stomach via peristalsis

what happens in a monogastric stomach?

HCl secretion assists with protein breakdown (chemical). Enzymatic digestion takes place as well. Mechanical activity and anatomical folds help increase surface area of chyme

Chyme

mixture of partially digested food with stomach secretions

What happens in the monogastric small intestine?

Major site of enzymatic digestion in monogastric carnivores and omnivores and nutrient absorption

Where and what does the cecum do in monogastrics?

Blind pouch between junction of small and large intestines which contains microbes and protozoa that break down complex sugars and cellulose

What happens in the large intestine?

Major site of reabsorption, concentrates undigested feed

What does the rectum and anal sphincter do?

thick muscular tube, extinction of solid undigested materials

Ruminants Stomach is divided into 4 compartments the ____, ____, _____, ____

Reticulum, Rumen, Omasum, Abomasum

What does the reticulum do?

Assists with fertilization (enzymatic); contracts to push food back up esophagus to mouth (chewing cud)

What is the rumen?

Huge sack containing microbes which digests feed ENZYMATICALLY and converts it into needed products

What happens in the omasum?

Has many folds (plies) that assist with MECHANICAL digestion

What happens in the abomasum?

Same functions as stomach in non-ruminants, MECHANICAL, CHEMICAL, AND ENZYMATIC digestion

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Proventriculus is the same but birds have ____ cecum

2

What is the crop?

modification of the esophagus where feed can be stored and limited enzymatic digestion by microbes takes place

In the proventriculus...

HCl and gastric enzymes digest feed but there is limited mixing due to gastric movements, CHEMICAL AND ENZYMATIC digestion

Feed in birds goes from proventriculus to _____

gizzard

What happens in the gizzard?

site where MECHANICAL digestion takes place to reduce particle size