Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.5.3 Practical: Investigating Photosynthesis & the Evolution of Oxygen Practical: Evolution of Oxygen We can demonstrate the evolution of oxygen (from the...
Investigating Variables that Affect Heart Rate There are a wide range of factors that influence the heart rate of an organism Experiments can be designed to investigate the effect of a named...
Heart Action: Initiation & Control Control of the basic heartbeat is?myogenic, which means the heart will beat without any external stimulus This intrinsic rhythm means the heart beats a...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.5.1 Photosynthesis Photosynthesis Theory Photosynthesis is an?endothermic?reaction in which energy from sunlight is transferred to the chloroplasts in green ...
The Human Retina The eye is a?sense organ?containing receptors sensitive to light intensity and colour Receptors?are groups of specialised cells that can generate an electrical impulse in a ...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.4.5 Active Transport Active Transport Theory Active transport is: The movement of particles through a cell membrane from a region of lower concentrati...
Investigating Touch and Temperature Receptors on Skin Within the human skin, there are many temperature and touch receptors that enable humans to interpret and respond to their environment E...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.4.4 Practical: Osmosis Practical: Factors that Influence Osmosis Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to...
Establishment of a Generator Potential When Pacinian corpuscles?are stimulated?by pressure on the skin this leads to the?establishment of a generator potential This happens due to the moveme...
