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...
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 ...
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...
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...
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...
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...
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...
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...
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 ...
