ANSC 3010 TEST 1 LSU QUESTIONS WELL ANSWERED LATEST UPDATE 2026

ANSC 3010 TEST 1 LSU QUESTIONS WELL ANSWERED LATEST UPDATE 2026 What is the challenge that livestock producers and nutritionists face when it comes to feeding animals? - Answers To increase the efficiency of conversion of feedstuffs into animal products. What is a diet? - Answers Feed constituent or group of feed constituents that aid in the support of life What is nutrition? - Answers A series of processes by which an animal takes in and assimilates feed components for promoting growth, milk, or fiber production and replacing worn or injured tissues 6 classes of nutrients - Answers Water, carbs, protein, lipid, vitamins and minerals 4 factors that influence food and feed production - Answers 1) Government regulatory practices 2) Prices received for products 3) Environmental conditions 4) Input costs (fertilizer, labor, equipment) True or False: All animals require the same nutrients - Answers False What are examples of natural feedstuff? - Answers corn, soybean, wheat What are examples of natural processed feedstuff? - Answers SBM, wheat bran, corn gluten feed What are examples of synthetic feedstuff? - Answers crystalline amino acids, vitamins What is a ration? - Answers amount of diet consumed in 24 hr period What is the most important nutrient? - Answers Water In what ways can an animal derive water? - Answers Drinking Feedstuffs Metabolic What is free water? - Answers the moisture associated with the feed. How is metabolic water made? - Answers Chemically bound and released when nutrients or body tissue are broken down by metabolic processes A general definition for good-quality water is that it should contain less than 2,500 mg/l (0.25%) of __________. - Answers Dissolved solids True or False: Water could be a source of mineral toxicity - Answers True Carbohydrates serve as a source of ________. - Answers Energy Carbohydrates comprise up to ___% of the dry matter of forages and as much as ___% in grains - Answers 70% 80% Chemically, carbohydrates are composed of _____, _______, and ______ - Answers C, H, O What is the simplest form of carbohydrate? - Answers monosaccharide; it contains either five or six carbons, and often referred to as a sugar What are the 2 most common simple sugars in feed? - Answers Sucrose (table sugar) and Lactose (milk sugar) ___________ and ____________ are the two polysaccharides found in plants in the highest concentrations. - Answers Starch and cellulose In monogastric animals, dietary carbohydrates must be converted to ____________. - Answers Simple sugars The primary source of amylase (enzyme) is the_______ - Answers pancreas Which animal needs a diet that is lower in carbohydrates? - Answers Cat Simple sugars are absorbed rapidly by the _____________. - Answers Small intestine True or False: When young ruminant animals are born, they are functionally monogastric animals - Answers True Microbial organisms cause the ________ in rumen to develop & mature - Answers papillae True or False: In ruminant animals, the amount of amylase and other enzymes secreted into the small intestine is very high, as compared to monogastric animals - Answers False; In ruminant animals, the amount of amylase and other enzymes secreted into the small intestine is quite LOW, as compared to monogastric animals. As a result, ruminant animals are LESS able to digest starch in the small intestine Ruminants are most efficient at digesting _______ __________ - Answers fibrous carbohydrates (cellulose and hemicellulose) What is Lignin? - Answers A compound associated with fibrous feedstuffs and dramatically affects the animal's ability to digest cellulose and hemicellulose Does the lignin content of plants increase or decrease as the plants mature? - Answers Increase True or False: Amino acids for protein synthesis are supplied in the diet or result from digestive processes in the GI tract. - Answers True True or False: Blood meal is highly soluble and high in protein - Answers True What are the 2 categories for amino acids? - Answers Essential amino acids (or nondispensable) and Nonessential amino acids (or dispensable). If a specific amino acid required to synthesize a protein is not available, the protein cannot be synthesized. This is referred to as a ___________ amino acid. - Answers limiting True or False: If a specific amino acid required to synthesize a protein is not available, the protein can still be synthesized - Answers False; If a specific amino acid required to synthesize a protein is not available, the protein cannot be synthesized List the 10 essential amino acids - Answers Methionine Arginine Threonine Tryptophan Histidine Isoleucine Leucine Lysine Valine Phenylalanine Ruminants can survive on diets that contain no protein but need ____ source - Answers N Which essential amino is only essential for cats? - Answers Taurine In simple stomach animals, how are dietary proteins convert to amino acids? - Answers Dietary proteins are converted into amino acids by the digestive secretions in the stomach. What are the 2 factors that relative biological value (BV) depend on? - Answers 1) How well animal GI tract converts to AA 2) How well amino acid balance compares to need True or False: In general, protein quality is more important to ruminants than simple-stomached species - Answers False; Protein quality is LESS important to ruminants than simple-stomached species A deficiency of protein can result for two reasons. What are they? - Answers 1) 1 or more AA's are limiting 2) Inadequate dietary protein True or False: Lipids have 2.25x more energy than carbohydrates - Answers True When all bonds on the carbon atom are taken up by a hydrogen, the result is _____________. - Answers saturated fatty acid Fat sources are classified as fats or oils, based on _________ ____________ at room temperature - Answers physical consistency Fats found in plants & animals are generally in the _____________ form - Answers triglyceride In monogastric animals, the primary site of fat digestion is the _______ ___________. - Answers Small intestine; Combined action of bile & pancreatic lipase digests the dietary fats True or False: Once in the tissues lining the GI tract, the dietary fats are transformed back to triglycerides and transported to the cells of the animal to be metabolized. - Answers True True or False: In general, fats absorb more completely than oils - Answers False; OILS absorb more completely than FATS Adequate amounts of fats are essential for absorption of fat-soluble vitamins. What are the fat- soluble vitamins? - Answers A, D, E, K Fats are used to synthesize various compounds required by the animal, or stored in fat deposits as an __________ _____________. - Answers Energy reserve What are the end products of energy metabolism? - Answers CO2, water, heat, and ATP What are the two fatty acids essential for mammalian species? - Answers Linoleic acid (C18:2) & linolenic acid (C18:3) What are 2 excellent sources of linoleic and linolenic acid? - Answers Corn and soybean oils What are essential fatty acids? - Answers Integral part of the lipid-protein structure of the cell membranes. Essential fatty acids are distributed widely among most of the common feedstuffs Essential amino acids are important in the structure of ________________. - Answers prostaglandins ________ ________ composition of the fat deposits reflects what the animal is consuming - Answers Fatty acid True or False: If an oil is fed to poultry or swine, carcass fat becomes more saturated - Answers False: If an oil is fed to poultry or swine, carcass fat becomes LESS saturated What are the major macrominerals? - Answers Ca (calcium), P (phosphorous), Cl (chlorine), Mg (magnesium), K (potassium), Na (sodium), S (sulfur) The largest amounts of minerals occur in the ____________ and provide its structural rigidity - Answers Skeleton ______ is an essential constituent of hemoglobin in the blood and myoglobin in muscle tissues - Answers Iron _____________ is a component of thyroid hormone - Answers Iodine __________ is a structural component of vitamin B12 - Answers Cobalt ___, ___, and _____ are involved in the regulation of osmotic pressure and pH in an animal's body fluids - Answers Na, K, and Cl ______________ is found in high concentrations in forages, so deficiency occurs only when the animal is fed high levels of grains - Answers Potassium _________ is always deficient in very young pigs - Answers Iron True or False: Mg deficiency is common in most livestock species - Answers False; Mg deficiency is NOT common in most livestock species True or False: As a general rule, mineral toxicity is much less