Statistics for Edexcel GCSE Biology Unit 8

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This quiz has been taken 35 times
The average score is 13 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	90%
Blood vessels with one cell thick walls, allowing faster diffusion of substances into and out of the vessels.	Capillaries	87%
The net movement of particles from an area of high concentration to an area of low concentration.	Diffusion	87%
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	87%
Straw-coloured liquid component of blood which carries dissolved substances such as glucose, carbon dioxide and urea.	Plasma	83%
Artery that carries oxygenated blood to the rest of the body from the left ventricle.	Aorta	77%
Protein found in red blood cells which binds with oxygen in the lungs and releases it in the tissues.	Haemoglobin	73%
Type of white blood cell that produces antibodies which bind to foreign cells in order to destroy them.	Lymphocytes	73%
Vein that carries oxygenated blood from the lungs to the left atrium.	Pulmonary vein	73%
Cell fragments that have no nuclei. They produce substances needed to clot blood at the site of an injury.	Platelets	70%
Artery that carries deoxygenated blood from the right ventricle to the lungs.	Pulmonary artery	70%
Vein that brings deoxygenated blood from the rest of the body.	Vena Cava	70%
Small pockets in which gases are exchanged between the air and the blood.	Alveoli	67%
Glucose + oxygen --> carbon dioxide + water	Aerobic respiration	63%
Type of white blood cell that surrounds and engulfs foreign cells (due to their flexible cell membranes) to digest them with enzymes.	Phagocytes	63%
Flaps of tissue in the veins and heart to prevent backflow of blood.	Valves	57%
The difference in concentration of a chemical across a membrane.	Concentration gradient	47%
All the chemical reactions that occur in the body.	Metabolism	37%
Wall of tissue separating the two sides of the heart.	Septum	30%
Stroke volume x heart rate = ?	Cardiac output	13%
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	7%
Stop valves from turning inside out.	Tendons	7%
Glucose -> lactic acid	Anaerobic respiration (in humans)	3%
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	3%