IB DP Biology: HL复习笔记6.5.2 Nerve Impulses
Resting Potential Neurones transmit information in the form of impulses, which travel extremely quickly along the neurone from one end to the other Note that an impulse is not an electrical current...
IB DP Biology: HL复习笔记6.5.1 Neurones: Function & Structure
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...
IB DP Biology: HL复习笔记6.4.4 Skills: Monitoring Ventilation
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,...
IB DP Biology: HL复习笔记6.4.3 Lung Diseases
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...
IB DP Biology: HL复习笔记6.4.2 Ventilation: Mechanism
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...
IB DP Biology: HL复习笔记6.4.1 Ventilation: Function & Structures
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 ...
IB DP Biology: HL复习笔记6.3.5 Antibiotic Resistance
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...
IB DP Biology: HL复习笔记6.3.4 Antibiotics
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...
IB DP Biology: HL复习笔记6.3.3 White Blood Cells
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 ...
