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- 1. Multiple Choice
Which type of cell is found in the greatest numbers in blood?
Red blood cell
White blood cell
Platelets
- 2. Multiple Choice
What happens to breathing and heart rate during exercise?
Breathing rate increases and heart rate decreases
They both increase
They both decrease
- 3. Multiple Choice
How do you calculate cardiac output?
Cardiac output = stroke volume / heart rate
Cardiac output = heart rate / stroke volume
Cardiac output = stroke volume X heart rate
- 4. Multiple Choice
How do you calculate surface area to volume ratio?
Surface area / volume
Surface area - volume
Surface area + volume
- 5. Multiple Choice
Why is the left wall of the heart have a thicker layer of muscle than the right side?
To stop the blood flowing backwards
To push the blood with more force at high pressure so it goes to all body cells.
To push the blood at high pressure to the lungs.
- 6. Multiple Choice
Why is there a limit to cell size in multicellular organisms?
As size of cells increase, their surface area to volume ratio also increases meaning substances would diffuse too slowly into the cell.
As size of cells increase, their volume decreases meaning substances would diffuse too slowly into the cell.
As size of cells increase, their surface area to volume ratio decreases meaning substances would diffuse too slowly into the cell.
- 7. Multiple Choice
Name 2 human excretory organs.
Heart and lungs
Brain and heart
Kidneys and lungs
- 8. Multiple Choice
What is the name of the liquid part of the blood?
Platelets
Plasma
Red blood cells
- 9. Multiple Choice
Give one adaptation of alveoli for efficient gas exchange.
Alveoli have a one cell thick lining for a short diffusion pathway.
Alveoli have a small surface area for fast diffusion of oxygen.
Alveoli have many a thick lining for a long diffusion pathway.
- 10. Multiple Choice
What do platelets do?
They stick together and make fibres that make scabs (blood clots) that stop pathogens entering the blood or stop you bleeding to death.
They form your immune system and destroy pathogens.
They carry oxygen around the body attached to haemoglobin.
- 11. Multiple Choice
What other names are given to red blood cells and also white blood cells?
Lymphocytes (red blood cells) and phagocytes and erythrocytes (white blood cells).
Erythrocytes (red blood cells) and phagocytes and lymphocytes (white blood cells).
Phagocyctes (red blood cells) and lymphocytes and erythrocytes (white blood cells).
- 12. Multiple Choice
What do phagocytes do?
Engulf (surround) microbes and digest them.
Produce antibodies.
Release a toxin that kills pathogens.
- 13. Multiple Choice
Why do arteries have a thick muscle layer?
To provide energy for the blood vessel.
To prevent the blood flowing backwards.
To help withstand the high pressure blood, also to contract to control blood flow.
- 14. Multiple Choice
List the structures in the circulatory system the blood travels through from vena cava to aorta.
Vena cava, lungs, pulmonary vein, left atrium, left ventricle, aorta, right atrium, right ventricle, pulmonary artery,
Vena cava, left atrium, right ventricle, pulmonary vein lungs, pulmonary artery, right atrium, left ventricle, aorta
Vena cava, right atrium, right ventricle, pulmonary artery, lungs, pulmonary vein, left atrium, left ventricle, aorta
- 15. Multiple Choice
Where would you find alveoli and what do they do?
In the arteries, they stop the artery from bursting.
In the heart, and they stop the blood flowing backwards
In the lungs and they are they site of gas exchange
- 16. Multiple Choice
Why do veins and the heart have valves?
To stop the backflow of blood
To contract to push the blood under high pressure
To cause the pulse
- 17. Multiple Choice
What type of blood vessel surround alveoli and other tissues in the body?
Capillaries
Arteries
Veins
- 18. Multiple Choice
Why is energy required by the body?
For creating glucose and oxygen
For respiration
For movement (muscle contraction) and keeping warm.
- 19. Multiple Choice
Give the word equation for aerobic respiration.
Glucose + carbon dioxide --> oxygen + water
Glucose --> lactic acid
glucose + oxygen --> carbon dioxide + water
- 20. Multiple Choice
What are the differences between anaerobic and aerobic respiration?
Anaerobic respiration takes place in mitochondria, releases less energy and forms lactic acid that causes cramp. Aerobic respiration occurs in cytoplasm, releases more energy and forms carbon dioxide and water which do not cause cramp.
Anaerobic respiration takes place in cytoplasm, releases less energy and forms lactic acid that causes cramp. Aerobic respiration occurs in mitochondria, releases more energy and forms carbon dioxide and water which do not cause cramp.
Anaerobic respiration takes place in cytoplasm, releases less energy and does not cause cramp. Aerobic respiration occurs in mitochondria, releases more energy and causes cramp.
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