Transmission of Nerve Impulses Neurones?transmit?electrical impulses?which travel along the neurone?cell surface membrane?from one end of a neurone to the other Note that an impulse is?not?an elect...
3.2.5 Practical: Effect of Catalysts on Rate of Reaction Practical: Effect of Catalysts on Rate of Reaction Aim: To investigate the effect of different solids on the catalytic decomposition ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.2.4 Practical: Effect of Surface Area on Rate of Reaction Practical: Effect of Surface Area on Rate of Reaction Aim: To investigate the effect of...
Nervous System: Response to a Stimulus The nervous system enables the body to?detect changes in the environment?and brings about?appropriate responses?to ensure its safety Receptor cells?detect cha...
Neurones: Structure & Function Neurones?are specialised cells of the nervous system which carry?electrical impulses?around the body A bundle of neurones is known as a?nerve There are different ...
Co-ordination of Response Organisms must?respond to changes?in their?external?and?internal?environments in order to survive Organisms need to Find favourable external conditions e.g. avoiding locat...
Modern Medicine & Participation in Sports Keyhole surgery Sports injuries?are a common occurrence since the body is placed?under stress?when participating in sporting activities Some of these i...
Intensity of Exercise Effects of too little exercise on health Exercise is an important part of a?healthy lifestyle Not doing enough exercise can have a detrimental effect on the health of an indiv...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.2.3 Catalysts Catalysts & Rates Catalysts are substances which?speed up?the?rate?of a reaction without themselves being?altered?or?con...
