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Leaving certificate biology
Ecology theory5 Topics|1 Quiz
Unit 1Nutrient recycling4 Topics|1 Quiz
Ecological relationships and population dynamics2 Topics
Human impact on the ecosystem2 Topics
Study of a grassland ecosystem3 Topics
Responses in the Flowering Plant4 Topics|1 Quiz
Unit 3Sexual reproduction in the flowering plant1 Topic
The human reproductive system3 Topics
The menstrual cycle2 Topics
The circulatory system4 Topics
The heart5 Topics
Lesson 12, Topic 5
The blood past paper questions
Some typical human red blood cells are shown below. They are disc shaped
What word is used to describe the shape of the two faces of these cells ?
Red blood cells are wider than some capillaries. What feature of red blood cells allows them to pass through the narrow capillaries?
They are flexible
Name the molecule in red blood cells that carries oxygen
Human red blood cells live for about 120 days. Give a reason for this, based on the composition of these cells
Where are red blood cells 1. produced and 2. usually broken down?
Produced: Bone marrow
Broken down : Liver
Red blood cells are transported in the blood plasma. Name the transport fluid in humans that does not contain red blood cells
Blood acts as a transport medium in the human body. Name two substances, other than food molecules and water, that are transported in the blood.
In terms of structure, state any two differences between the human blood and lymph systems
Double circulatory system
Single circulatory system
State two ways in which the structure of a red blood cell differs from that of other human cells
Human blood is classified into 4 different groups, A, B, AB, O. What other system is used to further classify blood