AQA A Level Biology复习笔记6.1.10 The Human Retina
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 ...
AQA A Level Biology复习笔记6.1.9 Investigating Touch and Temperature Receptors
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...
AQA A Level Biology复习笔记6.1.8 Generator Potential
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...
AQA A Level Biology复习笔记6.1.7 The Pacinian Corpuscle
The Pacinian Corpuscle Humans possess a wide range of receptor cells that can detect and respond to a large variety of stimuli For example, temperature, taste, sound, heat and light T...
AQA A Level Biology复习笔记6.1.6 Causes of Animal Movement
Investigating Environmental Factors That Cause Animal Movement Environmental factors can be abiotic or biotic Abiotic factors are the non-living parts of an environment For example: temperat...
AQA A Level Biology复习笔记6.1.5 Reflex Arcs
Reflex Arcs There are three main types of neurone: sensory, relay and motor Sensory neurones carry impulses from receptors to the Central Nervous System (CNS - the brain or spinal cord) Rela...
AQA A Level Biology复习笔记6.1.4 Taxis & Kinesis
Taxis & Kinesis An organism must find favourable living conditions in order to survive For complex organisms like monkeys and wolves, this seems like an easy process They possess eyes, e...
AQA A Level Biology复习笔记6.1.3 Indoleacetic Acid (IAA)
Indoleacetic Acid (IAA) Indoleacetic acid (IAA) is a specific growth factor found in plants IAA is synthesised in the growing tips of roots and shoots (ie. in the meristems, where cells are ...
AQA A Level Biology复习笔记6.1.2 Growth Factors in Flowering Plants
Growth Factors in Flowering Plants Growth responses in plants Just like animals, the survival of plants is dependent on their ability to respond to changes in their environment Some plants p...
