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Nutrition Chapter 7
Energy Balance and Weight Control
35
Biology
Undergraduate 1
03/28/2013

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Term
Energy Balance
Definition
the state in which energy intake, in the form of food and beverages, matches the energy expended, primarily through basal metabolism and physical activity.
Term
positive energy balance
Definition
the state in which energy intake is greater than energy expended, generally resulting in weight gain.
Term
negative energy balance
Definition
the state in which energy intake is less than energy expended, resulting in weight loss.
Term
bomb calorimeter
Definition
an instrument used to determine the calorie content of a food.
Term
basal metabolism
Definition
the minimal amount of calories the body uses to support itself in a fasting state when resting and awake in a warm, quiet environment.
Term
resting metabolism
Definition
the amount of calories the body uses when the person has not eaten in four hours and is resting and awake in a warm, quiet environment.
Term
lean body mass
Definition
body weight minus fat storage weight equals lean body mass.
Term
thermic effect of food
Definition
the increase in metabolism that occurs during the digestion, absorption, and metabolism of energy-yielding nutrients. This represents 5% to 10% of calories consumed.
Term
thermogenesis
Definition
this term encompasses the ability of humans to regulate body temperature within narrow limits. Two visible examples of thermogenesis are fidgeting and shivering when cold.
Term
brown adipose tissue
Definition
a specialized form of adipose tissue that produces large amounts of heat by metabolizing energy-yielding nutrients without synthesizing much useful energy for the body.
Term
direct calorimetry
Definition
a method of determining a body's energy use by measuring heat released from the body.
Term
indirect calorimetry
Definition
a method to measure the energy use by the body by measuring oxygen uptake.
Term
body mass index
Definition
weight divided by height squared; a value of 25 and above indicates overweight and a value of 30 and above indicates obesity.
Term
underwater weighing
Definition
a method of estimating total body fat by weighing the individual on a standard scale and then weighing him or her again submerged in water.
Term
air displacement
Definition
a method for estimating body composition that makes use of the volume of space taken up by a body inside a small chamber.
Term
bioelectrical impedance
Definition
the method to estimate total body fat that uses a low-energy electrical current. The more fat storage a person has, the more impedance to electrical flow will be exhibited.
Term
dual energy x-ray absorptiometry
Definition
a highly accurate method of measuring body composition and bone mass and density using multiple low-energy x rays.
Term
upper-body obesity
Definition
the type of obesity in which fat is stored primarily in the abdominal area, defined as a waist circumference more than 40 inches in men and more than 35 inches in women; closely associated with a high risk for cardiovascular disease, hypertension, and type 2 diabetes.
Term
lower body obesity
Definition
the type of obesity in which fat storage is primarily located in the buttocks and thigh area. Also known as gynoid or gynecoid obesity.
Term
identical twins
Definition
two offspring develop from a single ovum and sperm and, consequently, have the same genetic makeup.
Term
set point
Definition
often refers to the close regulation of body weight. It is not known what cells control this set point or how it functions in weight regulation.
Term
hypothalamus
Definition
a region at the base of the brain that contains cells that play a role in the regulation of hunger, respiration, body temperature, and other body functions.
Term
leptin
Definition
a harmone made by adipose tissue in proportion to total fat stores in the body that influences long-term regulation of fat mass.
Term
chain-breaking
Definition
breaking the link between two or more behaviors that encourage over-eating, such as snacking while watching television.
Term
stimulus control
Definition
altering the environment to minimize the stimuli for eating- for example, removing foods from sight and storing them in kitchen cabinets.
Term
cognitive restructuring
Definition
changing one's frame of mind regarding eating- for example, instead of using a difficult day as an excuse to overeat, substituting other pleasures for rewards, such as a relaxing walk with a friend.
Term
contingency management
Definition
forming a plan of action to respond to a situation in which overeating is likely, such as when snacks are within arm's reach at a party.
Term
self-monitoring
Definition
tracking foods eaten and conditions affecting eating; actions are usually recorded in a diary, along with location, time, and state of mind.
Term
relapse prevention
Definition
a series of strategies used to help prevent and cope with weight-control lapses, such as recognizing high-risk situations and deciding beforehand on appropriate responses.
Term
amphetamine
Definition
a group of medications that induce stimulation of the central nervous system and have other effects in the body. Abuse is linked to physical and psychological dependence.
Term
very low calorie diet
Definition
known also as protein sharing modified fast, this diet allows a person 400 to 800 kcal per day, often in liquid form
Term
bariatrics
Definition
the medical specialty focusing on the treatment of obesity.
Term
adjustable gastric banding
Definition
a restrictive procedure in which the opening from the esophagus to the stomach is reduced by a hollow gastric band.
Term
gastroplasty
Definition
gastric bypass surgery performed on the stomach to limit its volume to approximately 30 milliliters.
Term
underweight
Definition
a body mass index below 18.5
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