Exam revision Flashcards
(47 cards)
Definition of appetite
Appetite is the desire or want for food
Definition of conditioning
Conditioning is a behavioural process whereby a response becomes predictable and expected due to increased exposure
Definition of satiety
Satiety is the feeling of fullness or satisfaction after eating food
Definition of sensory appreciation
Sensory appreciation refers to how we use our senses to determine how we feel about a particular food
What are foods that provide satiety?
Foods high in protein- lean meats, fish and eggs
Low GI foods- keep you feeling fuller for longer- more slowly digested, absorbed and metabolised- low-fat dairy products, legumes
What are foods that do not provide satiety?
Foods high in sugar
Drinks high in sugar
Highly processed foods
What are the senses related to the sensory appreciation of food?
Appearance- size, shape, colour
Sound- sound of food being prepared and cooked
Texture- look, touch, chew food, evaluate how it feels
Aroma/Smell- olfactory receptor cells in the nose
Taste- bitter, sweet, spicy
Definition of absorption
Absorption in the digestive system occurs when nutrients pass through the small intestine lining.
Definition of accessory organ
An accessory organ is an organ that assists other organs to function in a system
Definition of chemical digestion
Chemical digestion refers to the process whereby enzymes and acids, secreted during digestion, break the chemical bonds that hold food together so that it can be more easily digested
Definition of enzymatic hydrolysis
Enzymatic hydrolysis is the term used to describe the process where enzymes use water to break down bonds during digestion
Definition of the gastrointestinal tract
The gastrointestinal tract refers to the passage or tube in the digestive system that food passes through
Definition of macronutrient digestion
Macronutrient digestion occurs when the proteins, carbohydrates and fats in food are broken down into smaller molecules as they pass through the gastrointestinal tract
Definition of macronutrient utilisation
Macronutrient utilisation refers to how the body uses the nutrients from food for energy, disease prevention, and everyday functioning
Definition of Mechanical/ Physical digestion
Mechanical/ physical digestion is the process whereby food is physically broken down into smaller particles and compounds by the digestive organs in our bodies
Definition of peristalsis
Peristalsis is the term used to describe the wave-like involuntary muscle contraction that move food along the digestive system
What are carbohydrates, proteins and fats/ lipids broken down into?
Carbohydrates broken down into glucose
Proteins broken down into amino acids
Fats/ Lipids broken down into fatty acids
Mouth- first part of the digestive system
The mouth, or oral cavity, is the initial section of the digestive system where food is mechanically broken down by the teeth and mixed by the tongue. Chemical digestion starts here as saliva is released, beginning to break down the food.
Tongue- accessory organ is the gastrointestinal tract
The tongue is an accessory organ in the gastrointestinal tract that helps knead food, while the teeth tear and grind it. Saliva moistens the mixture, making it easier to swallow, and at this point, the food is referred to as a bolus.
Salivary Glands- accessory organs in the gastrointestinal tract
Salivary glands are located around the mouth, tongue and throat. Salivary glands produce saliva when we see, taste, or imagine eating something appetising. Saliva contains enzymes that help digest food
Oesophagus
Once food is swallowed, peristalsis occurs (waves of muscle contractions) move the food down the oesophagus. At the end of the oesophagus the sphincter muscle opens allowing food to enter the stomach
Stomach
Inside the stomach, the muscles contract and mix the bolus with gastric juices. Gastric lipase also present in gastric juices, breaks down some fats into fatty acids. Bolus transforms into a mass of liquid called chyme in the stomach
Small intestine
Small intestine consists of three parts, the duodenum, the jejunum and the ileum. The primary function of the small intestine is to digest and absorb macronutrients
Gallbladder
Gallbladder stores bile. The gallbladder then contracts and releases bile into the small intestine