The Need For Food
Card Set Information
The Need For Food
Need Food Animal Survival Biology crobertsonx
Biology, Animal Survival, Subtopic
Food is needed by animals for:
a) ______, as an immediate source and longer term energy store.
b) ______ and ______ of damaged cells and tissues
b) growth and repair
There are three main food types:
a) _____________, which can be divided into starches and sugars
The chemical elements present in carbohydrates are:
______, ________ and ______
The chemical elements present in fats are:______, ________ and ______
The chemical elements present in proteins are:______, ________, ______ and ________
The basic building blocks of carbohydrates are simple sugars, like ________. Carbohydrates may also be complex molecules like ______.
individual animo acids
Proteins are large molecules made up of long chains of _____ _____ joined together.
A fat molecule consists of three _____ _____ joined to a ________ molecules in the shape of a letter E.
Digestion is the breakdown of _____ particles of food into ______ particles so that they can be ________ into the blood through the wall of the small intestine.
During digestion large ________ food particles into smaller ________ food particles.
Teeth are involved in the _________ __________ of food.
Incisors are ______ shaped for _______ and _______
Canine are _____ pointed for _______, _______ and holding ____
molars and premolars are large teeth with ______ surfaces for _______ and _______ food.
An animals _________ is the number and type of teeth that it possesses. This depends on what type of food the animal eats.
A herbivore is an animal that eats _____.
A carnivore is an animal that eats _______
An omnivore is an animals that eats _____.
both, animals and plants
The digestive system consists of the gut running from the _____ to the ____.
_________ is the name given to the muscular contractions of the gut wall.
During peristalsis circular muscles in the gut wall _______ behind the food while the muscles in front of the the food _____. This pushes the food along the gut.
The muscular contractions of the stomach wall help to mix the food with the gastric juice. This _____ __ the chemical breakdown of the food.
Digestive enzymes are chemicals which breakdown the large molecules of carbohydrates, proteins and fats down into
thier smaller sub-units.
______ enzymes act on carbohydrates, ________ enzymes act on proteins while ______ enzymes act of fats.
_______ enzymes are responsible for the breakdown of carbohydrates, proteins and fats
The ________ is the substance an enzyme acts on
The ________ are the substrates produced at the end of the reaction.
Fatty Acids and Glycerol
Main functions of the small intestine:
- to _________ digestion
- to ______ the digested foods across the wall of the small intestine into the bloodstream
The small intestine has a ____ _____ _______ ____
very large surface area
The surface area is very very large because
the small intestine
is very ____. The internal lining is ______ and has thousands of tiny _____ present.
The small intestine's internal lining is very ___ which allows digested foods to pass through into the blood _____ and _______
The small intestine has a very ____ _____ ______ which absorbs food _______ and carries it away quickly to the rest of the body.
rich blood supply
The _____ are well adapted for the absorption and transport of food.
Villi have a ____ _____, which allows digested food to pass through _______
Villi have a large network of _____ ________ into which ______ and _____ _____ are absorbed and then carried away quickly
Villi have a _______ into which digested fats are absorbed.
In a lacteal, fats are then quickly transported away in the _________ ______ and are eventually emptied into the bloodstream.
Any undigested food material passes from the end of the ________ into the _______
The undigested material passes along the large intestine then _____ is absorbed from it.
The faeces is stored in the ______ until it is passed out of the body through the ____