Edexcel A Level Biology A Topic 1
Lifestyle, Health and Risk 2024 Exam
with Answers 100% Pass
Solvent - Answer>>Substances dissolve in it e.g. water+++
dipolar - Answer>>Having a slightly positive charge and
negative charge
Cohesive - Answer>>They tend to stick together
Cohesion - Answer>>Attraction between molecules of the same
type
Which side of the heart carries oxygenated blood? -
Answer>>left
Why is the left side of the heart thicker? - Answer>>Because it
carries oxygenated blood
Where does blood from the vena cava go to? - Answer>>Right
atrium
Where does blood from the pulmonary vein go to? -
Answer>>Left atrium
Why does the heart have coronary arteries on the surface? -
Answer>>It needs oxygen it's own supply of oxygen to pump
the blood around the body
What is the valve between the atrium and ventricle? -
Answer>>Atrioventricular valves
, What is the valve between the right ventricle and the pulmonary
artery? - Answer>>Semi lunar valve
What is the valve between the left ventricle and aorta? -
Answer>>Semi lunar valve
What do valves do? - Answer>>Stop the back flow of blood
What are the three blood vessels? - Answer>>Arteries, veins
and capillaries
What do the arteries do? - Answer>>Carry blood from the heart
to the rest of the body
What are features of the artery? - Answer>>Thick muscle wall,
lots elastic fibres, small lumen
What are the features for in an artery - Answer>>To withstand
the high pressure of the blood, to be able to stretch and recoil
What do veins do? - Answer>>Take blood back to the heart
What are features of veins? - Answer>>Large lumen, thin
muscle wall, little elastic tissue
Why do veins have different features to arteries? -
Answer>>Veins are different because the blood that goes to
them are under lower pressure.
what is atheroma? - Answer>>it is a fatty deposit that makes
the lumen get smaller.
How does atherosclerosis occur? - Answer>>1)there is damage
to the endothelial wall
Lifestyle, Health and Risk 2024 Exam
with Answers 100% Pass
Solvent - Answer>>Substances dissolve in it e.g. water+++
dipolar - Answer>>Having a slightly positive charge and
negative charge
Cohesive - Answer>>They tend to stick together
Cohesion - Answer>>Attraction between molecules of the same
type
Which side of the heart carries oxygenated blood? -
Answer>>left
Why is the left side of the heart thicker? - Answer>>Because it
carries oxygenated blood
Where does blood from the vena cava go to? - Answer>>Right
atrium
Where does blood from the pulmonary vein go to? -
Answer>>Left atrium
Why does the heart have coronary arteries on the surface? -
Answer>>It needs oxygen it's own supply of oxygen to pump
the blood around the body
What is the valve between the atrium and ventricle? -
Answer>>Atrioventricular valves
, What is the valve between the right ventricle and the pulmonary
artery? - Answer>>Semi lunar valve
What is the valve between the left ventricle and aorta? -
Answer>>Semi lunar valve
What do valves do? - Answer>>Stop the back flow of blood
What are the three blood vessels? - Answer>>Arteries, veins
and capillaries
What do the arteries do? - Answer>>Carry blood from the heart
to the rest of the body
What are features of the artery? - Answer>>Thick muscle wall,
lots elastic fibres, small lumen
What are the features for in an artery - Answer>>To withstand
the high pressure of the blood, to be able to stretch and recoil
What do veins do? - Answer>>Take blood back to the heart
What are features of veins? - Answer>>Large lumen, thin
muscle wall, little elastic tissue
Why do veins have different features to arteries? -
Answer>>Veins are different because the blood that goes to
them are under lower pressure.
what is atheroma? - Answer>>it is a fatty deposit that makes
the lumen get smaller.
How does atherosclerosis occur? - Answer>>1)there is damage
to the endothelial wall
