EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：4.1.1 Organic Compounds Representing Organic Compounds Introduction Organic Chemistry is the scientific study of the structure, properties, ...
Detection of Light The eye is a?sense organ?containing receptors sensitive to light intensity and wavelength Receptors?are specialised cells that can generate an electrical impulse in a sensory neu...
Synapses: Structure & Function Structures known as?synapses?are found at the?junctions between cells in the nervous system?e.g. In the sense organs there are synapses between?sensory receptor c...
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 復(fù)習(xí)筆記：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...
