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Edexcel GCSE Biology Unit 8 - Statistics
General Stats
- This quiz has been taken 66 times
- The average score is 14 of 24
Answer Stats
| Hint | Answer | % Correct |
|---|---|---|
| Blood vessels that carry blood away from the heart. They have thick walls with elastic and muscle fibres and a narrow lumen as blood flows under high pressure. | Arteries | 91%
|
| The net movement of particles from an area of high concentration to an area of low concentration. | Diffusion | 91%
|
| Blood vessels that carry blood towards the heart. They have thin walls and a wide lumen as blood flows under low pressure. Also contain valves to prevent backflow of blood. | Veins | 89%
|
| Blood vessels with one cell thick walls, allowing faster diffusion of substances into and out of the vessels. | Capillaries | 86%
|
| Artery that carries oxygenated blood to the rest of the body from the left ventricle. | Aorta | 82%
|
| Straw-coloured liquid component of blood which carries dissolved substances such as glucose, carbon dioxide and urea. | Plasma | 81%
|
| Protein found in red blood cells which binds with oxygen in the lungs and releases it in the tissues. | Haemoglobin | 79%
|
| Artery that carries deoxygenated blood from the right ventricle to the lungs. | Pulmonary artery | 74%
|
| Type of white blood cell that produces antibodies which bind to foreign cells in order to destroy them. | Lymphocytes | 72%
|
| Vein that carries oxygenated blood from the lungs to the left atrium. | Pulmonary vein | 72%
|
| Vein that brings deoxygenated blood from the rest of the body. | Vena Cava | 72%
|
| Small pockets in which gases are exchanged between the air and the blood. | Alveoli | 70%
|
| Cell fragments that have no nuclei. They produce substances needed to clot blood at the site of an injury. | Platelets | 70%
|
| Type of white blood cell that surrounds and engulfs foreign cells (due to their flexible cell membranes) to digest them with enzymes. | Phagocytes | 68%
|
| Flaps of tissue in the veins and heart to prevent backflow of blood. | Valves | 68%
|
| Glucose + oxygen --> carbon dioxide + water | Aerobic respiration | 65%
|
| The difference in concentration of a chemical across a membrane. | Concentration gradient | 51%
|
| Wall of tissue separating the two sides of the heart. | Septum | 40%
|
| All the chemical reactions that occur in the body. | Metabolism | 39%
|
| Stroke volume x heart rate = ? | Cardiac output | 19%
|
| Red blood cells. They have a biconcave shape to increase the SA:V for maximum diffusion rate, and no nucleus to maximise space for (answer below). | Erythrocytes | 12%
|
| A series of exothermic chemical reactions, catalysed by enzymes, that release energy from substances such as glucose or fat which occur continuously in living cells to release energy for metabolic processes. | Cellular respiration | 5%
|
| Stop valves from turning inside out. | Tendons | 4%
|
| Glucose -> lactic acid | Anaerobic respiration (in humans) | 2%
|
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