Nutrition Flashcards
Nutrients are
Essential components of diets
Food is
An edible material that provides nutrients
Foodstuff is
Any material made into food
Diet is
A mixture of foodstuffs used to supply nutrients to an animal
Ration is a
Daily allocation of food
Nutrition is the
Process of providing and obtaining the food necessary for the health and growth of an animal. It is a quantitative science.
Nutrients are utilized by the body in this linear fashion (3)
- Digestion and absorption
- Blood transportation
- Metabolism in the cells
The science of nutrition is an integration of
Anatomy, physiology, biochemistry, and ecology
Two main components of food are
-dry matter
-water
Dry matter can be subdivided into
-organic
-inorganic
Inorganic dry matter includes
Minerals
Organic dry matter includes (6)
-carbohydrates
-lipids
-proteins
-nucleic acids
-organic acids
-vitamins
What is the major determinant of animal health, welfare, and production
Nutrition
In companion animals, poor nutrition can contribute to (5)
-digestive disorders
-obesity
-orthopaedic disease
-cardiorespiratory disease
-predisposition to infectious and parasitic disease
Feed accounts for ___ % of production animal costs
50-70
Three negative impacts of production animals on the environment
-over-grazing
-enteric greenhouse gas emissions
-polluting effects of manus and urine
Feeding tannin-containing feeds in production animals can
Reduce methane-producing rumen Protozoa
Optimizing calcium:phosphorylation ratios of laying birds can help to
Reduce phosphorus excretion and pollution
Two types of carnivores
-obligate carnivores
-mesocarnivores
Carnivores have (4)
-relatively large brains
-less complex digestive system
-strong facial musculature
-specialized dentition for shearing meat
Obligate carnivores (3)
-diet of at least 70% meat
-cannot properly digest vegetation
-examples: cats, ferrets
Mesocarnivores (3)
-diet of at least 50% meat
-can supplement diet with fruits/vegetables/fungi
-examples: dogs, foxes, raccoons
empirical formula of carbohydrates is
(CH2O)n
Omnivores (4)
-can eat and survive on both plant and animal matter
-diet of less than 30% meat
-mixture of sharp teeth and flat molars
-examples: chickens, pigs, humans, brown bears
Anatomically, herbivores can be divided into
-foregut fermenters (ruminants, camelids)
-hindgut fermenters (horses, pigs)
Nutritionally, herbivores can be classified as
-concentrate selectors (deer, giraffes)
-intermediate feeders (goats, alpacas)
-grazers (sheep, cattle, horses)
Herbivores (3)
-only eat feeds that require photosynthesis to live
-specialized dentition for grinding fibre
-large digestive tract for absorption of nutrients
Intermediate herbivore feeders
Change their diet according to availability (goats, alapacas)
Grazers
Mostly eat leaves or grasses (sheep, cattle, horses)
Concentrate selector herbivores (3)
-cannot tolerate large amounts of fibres
-feed on smaller amounts, more frequently
-deer, giraffes
Nutritional wisdom means
Grazing animals choose diets that maximize availability of energy and provide them with positive experiences
Grazing animal behaviours of Sheep (3)
-narrow muzzles, sensitive lips
-can obtain 80% of nutrition from plants
-better suited to pasture with less roughage and more variance
Grazing animal behaviours of Cattle (4)
-wide muzzles
-poorly selective of what they eat
-large amounts of high-fibre feeds
-suited to mature pastures with little variance
Domestic dog/cat diets (3)
-commercial pet foods
-home made foods
-treats
Domestic horse diets (3)
-forage (pasture/hay)
-cereals or concentrates (starch and energy-rich grains)
-treats (fruits/vegetables)
Production sheep/cattle diets (4)
-pasture
-energy supplements (grains or fodder ie. hay/silage)
-protein and non-protein nitrogen (urea) supplements
-mineral supplements
Water is obtained from three sources
-drinking water
-water present in food
-metabolic water
The non-water nutrition that animals consume is called
Dry matter
3 vital functions of water
-solvent for nutrient transportation and waste excretion
-facilitates enzyme-driven hydrolysis
-regulation of body temperature
organic dry matter is composed of
Carbon, hydrogen, and nitrogen
Inorganic dry matter is composed of
Predominately calcium and phosphorus in animals
Simplest form of carbohydrates are
Monosaccharides
Sugar is generally used to describe
Carbohydrates containing fewer than ten monosaccharides rings
Monosaccharides form a
Carbon ring with 1-7 carbon groups
Three groups of carbohydrates
-sugars
-fibres
-starches
Sugars can be ___ for energy
Directly absorbed
Fibres require ____ to access energy
Microbe fermentation
Starches (2)
-long-chain glucose polymers
-broken down into shorter chains before being utilized for energy
Fats are vital to carry
Lipid-soluble vitamins
The major form of energy storage in animals are
Lipids (mainly as fat)
Two main types of lipids found in plants
-structural lipids (found on plant surface)
-storage lipids (found in fruit and seeds)
Two essential dietary fats in mammals are
-linoleic acid
-alpha-linolenic acid
What acid can be slowly synthesized from linoleic acid
Arachidonic acid
Deficiency of linoleic and alpha-linolenic fatty acids can cause (8)
-poor growth
-increased water permeability / consumption
-increased susceptibility to bacterial infection
-capillary fragility
-kidney damage
-decreased myocardial contractility
-decreased ATP synthesis
-potential death
Proteins (4)
-complex organic compounds of high molecular weight
-consists of long chains of amino acids
-contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulphur
-found in all living cells
Amino acids (4)
-produced when proteins are hydrolysed
-have a basic nitrogenous group (NH2) and an acidic carboxyl unit (COOH)
-over 200 amino acids
-20 amino acids commonly found as components of proteins
Proteins and amino acids are in a
Constant state of exchange
Transanimation is the
Process where certain amino acids can be produced from others
There are ___ essential amino acids
10
Essential amino acids have
Carbon skeletons that cannot be transanimated
Essential amino acid of poultry chicks
Glycine
Essential amino acid of cats
Taurine
True or False: Ruminants cannot synthesize all essential amino acids
False. Ruminants utilize the rumen microbe synthesis to supply ALL essential amino acids
Vitamins (4)
-organic compounds containing carbon, hydrogen, and oxygen
-comprised of a single chemical unit
-required by body in small amounts
-at least 14 vitamins are essential
Water soluble vitamins (6)
-absorbed with water
-enter directly into bloodstream
-absorbed in duodenum and jejunum
-excess excreted in urine
-NOT stored within the body
-risk of toxicity is low
5 types of water soluble vitamins
-B1
-B2
-B6
-B12
-C
Vitamin B1 (4)
-Thiamine
-major function in cellular respiration (Krebs cycle)
-deficiency can occur through low intake or ingestion of thiaminase
-toxicosis is very rare
Defieicneyc of vitamin B1 (Thiamine) can result in (4)
-reduced weight gain
-in coordination
-hypothermia of extremities
-cerebral cortex necrosis
Vitamin B2 (3)
-Riboflavin and Nicotinamide
-major function in cellular respiration as a hydrogen transporter
-toxicosis has not been observed
Deficiency of vitamin B2 (Riboflavin and Nicotinamide) can lead to (3)
-poor growth
-disrupted oestrous activity
-“curled toe paralysis” in chicks
Vitamin B6 Group (3)
-Pyridoxine, Pantothenic Acid, Biotin, Folic Acid, and Choline
-major function in digestion (absorption of amino acids) and gene expression (cell response to steroid hormones)
-toxicosis can result in peripheral neuropathy (photosensitivity, nausea)
Deficiency of the vitamin B6 group can lead to (4)
-nerve degeneration (grinding teeth, thrashing legs, seizures)
-haemorrhage in the epicardium (anaemia)
-impaired immune function
-dermatitis and alopecia
A deficiency in vitamin B12 (Cobalamin) in grazing animals is mostly related to
Copper deficiency
Vitamin B12 (4)
-Cobalamin
-major function in providing cellular energy during cellular respiration
-assists in methionine and folic acid metabolism
-toxicosis has not been observed
Deficiency in vitamin B12 (Cobalamin) can lead to (4)
-weight loss
-poor growth
-muscle weakness
-diarrhea
Vitamin C (3)
-Ascorbic Acid
-major function as an antioxidant and involved in a wide range of metabolic functions
-deficiency is rare in most species as they can synthesis Vitamin C from glucose
Scurvy is a deficiency in ___ and causes (4)
-vitamin C (Ascorbic Acid)
-swollen gums
-muscular weakness
-diarrhea
-poor hair coat
Toxicosis of Vitamin C (Ascorbic Acid) can result in (3)
-reduced litter size
-reduced vitamin B12
-excessive absorption of iron—> anaemia
5 types of fat soluble vitamins
-A
-D2
-D3
-E
-K
Fat soluble vitamins (3)
-absorbed in duodenum
-stored in various places of the body
-risk of toxicity is higher BUT effect is less serious
Vitamin A is mainly stored in the
Liver
Vitamins K and E are partially stored in the
Liver
Vitamin D is mainly stored in
Fat and muscle tissue
Vitamin A (2)
-Retinol
-major function in low-light vision (precursor for rhodopsin), gene expression, and epithelial tissue formation
Vitamin A (retinol) deficiency can lead to (5)
-night blindness
-poor growth
-reduced fertility
-hyperkeratinisation of the skin
-increased susceptibility to infection (especially respiratory disease)
Vitamin A (retinol) toxicosis can lead to (3)
-teratogenicity (foetal abnormalities)
-loss of skin
-fragile, overgrown bones
Vitamin D (2)
-Calciferol
-important for calcium regulation, cell differentiation, and immune function
Vitamin D deficiency can lead to (2)
-bone disorders (rickets, osteomalacia, osteoporosis)
-teratogenicity (foetal abnormalities)
Toxicosis of vitamin D can lead to (2)
-hypercalcaemia and calcification of soft tissues
-brittle bones due to excessive resorption
Vitamin E (2)
-Tocopherol
-antioxidant and immune function
Vitamin E deficiency can result in (2)
-muscle degeneration
-anaemia, especially in newborns
Toxicosis of Vitamin E can cause
Coagulopathy (bleeding)
Vitamin K (3)
-Phylloquinone, Menaquinone, and Menadione
-major role in coagulation, energy metabolism, and spermatogenesis
-toxicosis is rare
Vitamin K deficiency (2)
-very common (ingestion of anti-coagulant rat baits)
-bleeding disorders, anaemia
Ingestion of anti-coagulant rat baits can lead to
Vitamin K deficiency
5 roles of minerals
-structure (skeleton and teeth)
-acid-base balance
-digestion (maintains acidity of digestive fluids)
-osmotic pressure
-movement