Studying the Brain Our understanding of brain structure and function is limited The brain is incredibly?complex?and?very delicate Different regions work together to bring about brain function so ca...
Brain: Structure & Function The brain, alongside the spinal cord, is part of the?central nervous system?(CNS) The brain is made of billions?of?interconnected?neurones Within the brain are?diffe...
Phytochrome Flowering in plants is controlled by the?stimulus?of night length Nights are shorter during the spring and summer and longer in the autumn and winter Some plants flower when nights are ...
The Effects of IAA Just like animals, the survival of plants is dependent on their ability to?respond to changes?in their environment; this?maximises their survival chances?e.g. Growing towards lig...
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...
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 ...
