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Edexcel GCSE Biology Questions And Answers Well Defined., Exams of Nursing

University of CambridgeNursing

Edexcel GCSE Biology Questions And Answers Well Defined.

Typology: Exams

2024/2025

Available from 07/17/2025

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Edexcel GCSE Biology (9-1) CB8
plasma - correct answer The straw-coloured liquid component of blood.
platelet - correct answer Cell fragments that are important in the clotting
mechanism of the blood.
pulse - correct answer A shock wave caused by the contraction of the heart
muscles, which travels through the walls of arteries leading from the heart.
red blood cell - correct answer A biconcave disc containing haemoglobin that
gives blood its red colour and carries oxygen around the body to the tissues. Also known as an
erythrocyte.
valve - correct answer A structure made of flaps of tissue that stops blood
flowing in the wrong direction.
vein - correct answer A blood vessel that transports blood towards the heart.
white blood cell - correct answer A type of blood cell that forms part of the
body's defence system against disease. There are many different types of white blood cell, including
lymphocytes and phagocytes.
aorta - correct answer The major artery leading away from the heart.
atrium - correct answer An upper chamber in the heart that receives blood
from the veins. (Plural is atria.)
cardiac output - correct answer The volume of blood the heart can pump out
in one minute. It is calculated using the equation: cardiac output = stroke volume × heart rate
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Edexcel GCSE Biology (9-1) CB

plasma - correct answer The straw-coloured liquid component of blood. platelet - correct answer Cell fragments that are important in the clotting mechanism of the blood. pulse - correct answer A shock wave caused by the contraction of the heart muscles, which travels through the walls of arteries leading from the heart. red blood cell - correct answer A biconcave disc containing haemoglobin that gives blood its red colour and carries oxygen around the body to the tissues. Also known as an erythrocyte. valve - correct answer A structure made of flaps of tissue that stops blood flowing in the wrong direction. vein - correct answer A blood vessel that transports blood towards the heart. white blood cell - correct answer A type of blood cell that forms part of the body's defence system against disease. There are many different types of white blood cell, including lymphocytes and phagocytes. aorta - correct answer The major artery leading away from the heart. atrium - correct answer An upper chamber in the heart that receives blood from the veins. (Plural is atria.) cardiac output - correct answer The volume of blood the heart can pump out in one minute. It is calculated using the equation: cardiac output = stroke volume × heart rate

chamber - correct answer An enclosed space. A human heart has four chambers. contract - correct answer To become smaller. When muscles contract, they shorten and become fatter. deoxygenated blood - correct answer Blood in which the red blood cells are only carrying small amounts of oxygen. Deoxygenated blood is a dark red colour. heart attack - correct answer When the heart stops pumping properly due to a lack of oxygen reaching part of it. heart rate - correct answer The number of heart beats in a unit of time, usually per minute (beats/min). heart valve - correct answer A structure made of flaps of tissue between an atrium and a ventricle of the heart. The heart valve stops blood flowing in the wrong direction when the heart muscle contracts. impulse - correct answer An electrical signal transmitted along a neurone. oxygenated blood - correct answer Blood in which the red blood cells are carrying large amounts of oxygen. Oxygenated blood is a bright red colour. pulmonary artery - correct answer An artery that carries deoxygenated blood from the right atrium to the lungs. pulmonary vein - correct answer A vein that carries oxygenated blood from the lungs to the left atrium. septum - correct answer A wall of tissue. The septum in the heart completely separates the chambers on the right from those on the left.

metabolism - correct answer All the chemical reactions that occur in an organism. multicellular organism - correct answer An organism that is made up of many cells. surface area to volume ratio - correct answer The total amount of surface area of an object divided by its volume. The bigger the ratio, the more surface area something has per unit volume. urea - correct answer A waste product made in the liver from excess amino acids. antibody - correct answer A protein produced by lymphocytes. It attaches to a specific antigen on a microorganism and helps to destroy or neutralise it. artery - correct answer A blood vessel that carries blood away from the heart. blood - correct answer The fluid that carries oxygen and other substances from the heart to the body. capillary - correct answer A tiny blood vessel with thin walls to allow for the transfer of substances between the blood and tissues. erythrocyte - correct answer Another term for red blood cell. haemoglobin - correct answer The red, iron-containing pigment found in red blood cells. heart - correct answer A muscular organ in the circulatory system that pumps blood around the body.

lymphocyte - correct answer A type of white blood cell that produces antibodies. phagocyte - correct answer A white blood cell that is capable of engulfing microorganisms such as bacteria. aerobic respiration - correct answer A type of respiration in which oxygen is used to release energy from substances such as glucose. anaerobic respiration - correct answer A type of respiration that does not need oxygen. cellular respiration - correct answer Chemical process by which living cells produce energy in the cell. exothermic - correct answer A type of reaction in which energy is transferred to the surroundings from the reactants. This energy transfer usually causes the temperature of the surroundings to rise. glucose - correct answer A sugar produced by the digestion of carbohydrates and needed for respiration. lactic acid - correct answer The waste product of anaerobic respiration in animal cells. mitochondrion - correct answer A sub-cellular structure (organelle) in the cytoplasm of eukaryotic cells, where aerobic respiration occurs. (Plural is mitochondia.)