B2-Organisation Flashcards
(18 cards)
Name the five levels of organisation
in living organisms in order of size (smallest to largest)
Cell, tissue, organ, organ system,
organism
What is described as a group of
cells with similar structure and
function?
Tissue
What is described as a group of tissues working together to perform a specific function?
Organ
What is described as a group of
organs working together to perform
a specific function?
Organ system
Name three enzymes that are
produced in the pancreas
Protease, lipase, amylase
What substance neutralises stomach acid and emulsifies fat during digestion?
Bile
What enzyme is released with the
saliva to break down carbohydrates?
Amylase
How are alveoli adapted for gas
exchange?
Large surface area
Good blood supply
Thin moist walls
Large diffusion gradient
State the four componants of the blood
Red blood cells, white blood cells,
platelets and plasma
What feature do veins have to stop
the backflow of blood?
Valves
Which blood vessel carries blood into
the heart from the body?
Vena cava
Which blood vessel takes blood from the heart to the lungs?
Pulmonary veins
Where are pacemaker cells found?
Right atrium
What are the two types of tumour?
Benign and malignant
Give two risk factors of CHD
Smoking, poor diet and stress
What is the process by which plants release water out of their stomata?
Transpiration
State two ways leaves are adapted for gas exchange
Large surface area, thin, large
networks of veins and stomata
What is the name of the cells that surround the stomata?
Guard cells
