Definition Topic 1 edexcel A level biology
Accuracy - How close the data is to the correct or accepted value.
Amylopectin - A branched polysaccharide made up of alpha glucose monomers joined
by α-1,6 glycosidic bonds that makes up starch along with amylose.
Amylose - An unbranched polysaccharide made up of alpha glucose monomers joined
by α-1,4 glycosidic bonds that makes up starch along with amylopectin.
Anticoagulants - A class of drug used to stop blood from forming clots and used as a
treatment for CVD.
Antihypertensives - A class of drug that is used as a treatment for high blood pressure
(hypertension).
Aorta - The main artery that carries oxygenated blood away from the heart at high
pressure.
Arteriole - A smaller type of blood vessel that connects arteries with capillaries.
Artery - A type of blood vessel that carries blood at high pressure away from the heart.
Atherosclerosis - A disease caused by a buildup of fatty deposits within arteries which
narrows them and can restrict blood flow.
Atrial systole - The phase in the cardiac cycle following diastole where the atria contract
and force the blood into the ventricles.
, Atrium - A type of chamber in the heart which receives blood directly from a vein and
passes it on to a ventricle.
Body mass index (BMI) - A method of measuring a person's weight with respect to their
height to calculate whether they are of a healthy weight or not.
Capillary - A very small blood vessel with thin walls and a small diameter used for
substance exchange in tissues.
Cardiac diastole - The phase in the cardiac cycle following ventricular systole where the
atria and ventricles are both relaxed and blood flows into the atria.
Cardiovascular disease - A term used to describe a group of diseases related to the
heart and blood vessels.
Causation - A relationship between two values or pieces of data where one influences
the other.
Coagulation - The process of blood turning into a gel and forming a clot, often in
response to a broken blood vessel to prevent blood loss.
Condensation reaction - A type of reaction that joins two molecules together with the
formation of a chemical bond involving the elimination of a molecule of water.
Coronary artery - The main artery that supplies the heart tissue with blood.
Correlation - An observed relationship between two completely separate values or
pieces of data.
Dipole - A molecule which has an unequal distribution of electrons which causes atoms
in the molecule to have partial charges.
Accuracy - How close the data is to the correct or accepted value.
Amylopectin - A branched polysaccharide made up of alpha glucose monomers joined
by α-1,6 glycosidic bonds that makes up starch along with amylose.
Amylose - An unbranched polysaccharide made up of alpha glucose monomers joined
by α-1,4 glycosidic bonds that makes up starch along with amylopectin.
Anticoagulants - A class of drug used to stop blood from forming clots and used as a
treatment for CVD.
Antihypertensives - A class of drug that is used as a treatment for high blood pressure
(hypertension).
Aorta - The main artery that carries oxygenated blood away from the heart at high
pressure.
Arteriole - A smaller type of blood vessel that connects arteries with capillaries.
Artery - A type of blood vessel that carries blood at high pressure away from the heart.
Atherosclerosis - A disease caused by a buildup of fatty deposits within arteries which
narrows them and can restrict blood flow.
Atrial systole - The phase in the cardiac cycle following diastole where the atria contract
and force the blood into the ventricles.
, Atrium - A type of chamber in the heart which receives blood directly from a vein and
passes it on to a ventricle.
Body mass index (BMI) - A method of measuring a person's weight with respect to their
height to calculate whether they are of a healthy weight or not.
Capillary - A very small blood vessel with thin walls and a small diameter used for
substance exchange in tissues.
Cardiac diastole - The phase in the cardiac cycle following ventricular systole where the
atria and ventricles are both relaxed and blood flows into the atria.
Cardiovascular disease - A term used to describe a group of diseases related to the
heart and blood vessels.
Causation - A relationship between two values or pieces of data where one influences
the other.
Coagulation - The process of blood turning into a gel and forming a clot, often in
response to a broken blood vessel to prevent blood loss.
Condensation reaction - A type of reaction that joins two molecules together with the
formation of a chemical bond involving the elimination of a molecule of water.
Coronary artery - The main artery that supplies the heart tissue with blood.
Correlation - An observed relationship between two completely separate values or
pieces of data.
Dipole - A molecule which has an unequal distribution of electrons which causes atoms
in the molecule to have partial charges.
