Paper 1 B2 Flashcards
What do enzymes do?
Break down starch and sugars
What is the use of idoine
Test for starch
What test is used for sugars
Benedict’s
What colour will the solution turn in iodine /test for starch
Black
What colour will the solution turn in the test for sugars/ Benedict’s
Yellow
What are the walls of arteries like?
Thick
Are capillaries big
No, only one cell thick
How are capillaries specialised to gas exchange
Gaps in walls to diffuse easier
What stops blood going in the wrong direction
Valves
What blood cell fights against infection
White blood cell
What do some white blood cells produce
Antibodies
Do white blood cells have a nucleus
Yes
What are communicable diseases
Can be spread person to person
Bacteria or fungi
Malaria and measles
What is non communicable disease
Can not be spread
Heart disease
What do immune system helps what?
Fight off pathogens
Can diet effect a persons health
Yes
How
is cancer spread through. The body
Cell growth and division
What 2 lifestyle factors can increase risk of cancer
Smoking and obesity
What is a tissue
Group of cells have a similar structure
What is transpiration
Process of water movement in leaves or similar
What is a statin
Lower cholesterol in blood
1 advantage and disadvantage of statin
Help lower blood production
Could get memory loss
What is an organ system
A group of organs work to together to perform functions
