B6.3 Can reflex responses be learned? A reflex is an automatic response to a stimulus. Although they are not conscious actions, reflex responses to a new stimulus can be learnt by introducing the secondary (new) stimulus in association with the primary stimulus and...
B6.4 How do humans develop more complex behavior? The evolution of a larger brain gave early humans a better chance of survival – early humans could use tools, coordinate hunting and formulate plans about what might happen in the future. Having a larger brain meant...
B6.2 How is information passed through the nervous system? Nervous systems are made up of neurons (nerve cells) linking receptor cells (e.g. in eyes, ears and skin) to effector cells (in muscles/glands) Neurons carry impulses from one place to another, around the many...
B6.1 How do animals respond to changes in their environment Living organisms can detect and respond to a STIMULUS (a change in the environment of an organism such as light, temperature, etc.) RECEPTORS are stimulated by the stimulus and produce a rapid, involuntary...