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Function & Structure of Neurones The nervous system The human nervous system consists of: Central nervous system (CNS) – the brain and spinal cord Peripheral nervous system (PNS) – all of the n...
Practical 6: Monitoring Ventilation The volume of air within the lungs of an individual will change depending on their level of activity When at rest, breathing is shallow and slow When exercising,...
Cancer NOS: Obtain evidence for theories: epidemiological studies have contributed to our understanding of the causes of lung cancer Theories are developed based on evidence collected through obser...
Inspiration & Expiration Breathing in The breathing-in, or inspiration, process causes the volume of the chest to increase and the air pressure to decrease until it is lower than the atmospheri...
Ventilation Ventilation can be defined as The replacement of older air in the lungs with fresh air from the body's external environment Ventilation is essential for the effective exchange of gases ...
Antibiotic Resistance Within a bacterial population, there is variation caused by mutations (as occurs in populations of all species) A chance mutation might cause some bacteria to become resistant...
Antibiotics Antibiotics are drugs that inhibit the growth of microorganisms Most antibiotics kill or stop the growth of bacteria (prokaryotes) but do not harm the cells of the infected organism Thi...
White Blood Cells Phagocytes are white blood cells that are produced continuously in the bone marrow They are responsible for removing dead cells and invasive microorganisms; a non-specific immune ...
Platelets When the skin is cut, microorganisms have an entry point to get into the body The first line of defence is compromised In order to minimise the risk of substantial blood loss and entry of...
