Imbalances in Brain Chemicals Leading to Diseases Neurotransmitters are chemicals that transmit nerve impulses across synapses Some disorders and diseases are linked to an imbalance of neurotransmi...
Habituation Animals must respond to changes in their external and internal environments in order to survive Changes in the environment, or stimuli (singular stimulus) are detected by specialised re...
The Role of Animal Models in Research The human brain is very difficult to study The brain is complex and its tissues are delicate meaning that it is easy to cause damage during a surgical examinat...
Development of the Visual Cortex The visual cortex is the region of the cerebral cortex in which visual information is processed The cerebral cortex is the outer layer of the cerebrum Soon after bi...
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...
