Calculating Cardiac Output Cardiac output (CO) is the term used to describe the volume of blood that is pumped by the heart (the left and right ventricle) per unit of time An average adult h...
Edexcel IGCSE Biology 复习笔记 2.5.5 Practical: Investigating Carbon Dioxide & Photosynthesis Practical: Investigating Carbon Dioxide & Photosynthesis The iodine test for starch can ...
Edexcel IGCSE Biology 复习笔记 2.5.4 Practical: Investigating Light & Photosynthesis4 Practical: Investigating Light & Photosynthesis Although plants synthesise glucose during photos...
The Autonomic Nervous System There are several circumstances that can cause an individual's heart rate to increase, such as during exercise The brain is involved in this response of the hear...
Edexcel IGCSE Biology 复习笔记 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 复习笔记 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 ...
