Topic 1: MTAH - 1.6 - 1.9: The cardiovascular System Flashcards
Affinity
The tendency of one substance to bind with another substance
Atrial Systole
The phase in the cardiac cycle following diastole where the atria contract and force the blood into the ventricles.
Circulation
A type of mass transport that overcomes the limitations of diffusion in meeting the requirements of organisms.
Cardiac diastole
The phase in the cardiac cycle following ventricular systole where the atria and vetricules are both relaxed and blood flows into the atria.
Diffusion
The passive spreading out of substances from a high concentration to a lower concentration ( down their concentration gradient) without the use of energy.
Foetal haemoglobin
The higher affinity form of haemoglobin found in the blood of a developing foetus.
Haemoglobin
The oxygen-carrying conjugated protein found in erythrocytes has a quaternary structure made of two alpha and two beta chains, which each contain a ham prosthetic group.
Mass transport
The bulk transport of substance to all parts of an organism using mass flow
Oxygen affinity
The continuous relationship between haemoglobin oxygen saturation ans oxygen tension
Oxygen dissociation curve
A graph that describes the relationship between the partial pressure of oxygen and the percentage saturation of haemoglobin in the blood.
The Bohr effect
A decrease in the affinity of haemoglobin for oxygen in areas with high carbon dioxide concentration.
Ventricular systole
The phase in the cardiac cycle following atrial systole where the ventricles contract and force the blood out of the herat and around the body.
Venule
A smaller type of blood vessels that connects veins with capillaries.
