Biology Unit 1 (Digestion, Breathing, Gas Exchange, Skeleton, Muscles) Flashcards
(34 cards)
Why does the body need protein?
For growth and repair
Why does our body need carbohydrates?
For energy
Why does food need to be digested?
To make it small enough to be absorbed into the blood
Where is food absorbed?
The small intestine
What is deficient if someone has scurvy?
Vitamin C
What is starch digested into?
Sugar
Which enzyme digests starch?
Amylase
What are the 5 jobs for the skeleton?
Movement, support, making blood cells, protection, shape
What connects bones and muscles
Tendons
What connects bones to bones
Ligaments
What muscles contract to bend the arm?
Biceps
What muscles contract to straighten the arm?
Triceps
How does oxygen get from the alveoli into the blood?
By diffusion
Where does gas exchange happen?
In the alveoli
What are the organs in the digestive system?
Mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus
What is the purpose of fats and lipids?
Energy store
What do you need minerals and vitamins for?
Needed in small amounts to stay healthy
What is fibre used for?
Helps the digestive system
What is the purpose of water?
To keep our cells hydrated
….goes in and …. Goes out (gas exchange)
Oxygen, carbon dioxide
What is ventilation?
Air going into and out of the lungs
Gas exchange system?
Trachea, bronchi, bronchi-hole, air sacks, alveoli, diaphragm, intercostal muscles, ribs
Materials at the end of bones to protect it from wearing away?
Cartilage
Pair of muscles that work against each other to move the bone?
Antagonistic pairs
