Summary
Neurobiology and behaviour explores the development and function of the nervous system, including the brain and its role in processing stimuli and controlling behaviour.
- Neural Tube — a structure formed by the infolding of the ectoderm in embryonic chordates. Example: It develops into the central nervous system.
- Neurulation — the process of forming the neural tube in embryonic chordates. Example: Involves the differentiation of ectodermal cells into a neural plate.
- Neuroplasticity — the ability of the nervous system to change and adapt. Example: Enables learning and memory by rerouting and sprouting neural connections.
- Stroke — a sudden death of brain cells due to inadequate blood flow. Example: Can lead to reorganization of brain function due to neuroplasticity.
- Photoreception — the mechanism by which light is detected by the eyes. Example: Rod and cone cells in the retina convert light into nerve impulses.
- Taxis — a movement towards or away from a stimulus. Example: Euglena moves towards light (positive phototaxis).
- Kinesis — a change in activity rate in response to a stimulus. Example: Woodlice move more in dry conditions to find moisture.
- Reflex Arc — the neural pathway that mediates a reflex action. Example: Involves sensory neurons, relay neurons, and motor neurons.
- Operant Conditioning — learning through trial and error experiences. Example: Animals learn to associate a behaviour with a consequence.
- Endorphins — natural painkillers produced by the body. Example: Released during stress or exercise to reduce pain perception.
Exam Tips
Key Definitions to Remember
- Neural Tube
- Neurulation
- Neuroplasticity
- Stroke
- Photoreception
- Taxis
- Kinesis
- Reflex Arc
- Operant Conditioning
- Endorphins
Common Confusions
- Difference between taxis and kinesis
- Role of neuroplasticity in stroke recovery
- Distinction between innate and learned behaviour
Typical Exam Questions
- What is the neural tube and how does it form? The neural tube is formed by the infolding of the ectoderm and develops into the central nervous system.
- How does neuroplasticity contribute to learning? Neuroplasticity allows the nervous system to change and adapt, reinforcing certain connections for learning.
- What is the difference between taxis and kinesis? Taxis is directional movement towards or away from a stimulus, while kinesis is a change in activity rate in response to a stimulus.
What Examiners Usually Test
- Understanding of neural development processes
- Ability to explain neuroplasticity and its implications
- Differences between innate and learned behaviours
- Mechanisms of sensory perception and reflex actions
