5 a day revision B6 – Brain & memory What is memory?

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Presentation transcript:

5 a day revision B6 – Brain & memory What is memory? What are the functions of the cerebral cortex? Give 3 methods that can be used by scientists to study the brain. Which of these two phone numbers would be easier to remember? Why? A: 01702 865749 B: 01234 654321 The multi-store model tries to explain how we store and retrieve information. What are some of the limitations of this model?

5 a day revision B6 - conditioning Why are conditioned reflexes useful? What is conditioning? In a conditioned reflex what is the connection between the secondary stimulus and the final response? Describe the experiment carried out by Pavlov. Describe how conditioning allows a bird to learn not to eat brightly coloured caterpillars that might be poisonous.

5 a day revision B6 - Learning What have we learnt from feral children about acquiring new skills? Why is it harder to learn new skills as we get older? Why are complex animals able to adapt to new situations better than simple ones. What happens to the brain when we develop and learn new skills? Think of 5 things that you think you have learnt that are vital to your survival.

5 a day revision B6 – Neurones and synapses What is a synapse? Describe how an impulse is transmitted across a synapse. What is the function of the fatty sheath surrounding some neurones? What is a synapse? i) An impulse takes 0.02 seconds to pass from the finger to the spinal cord, a distance of 1.5m. Calculate the speed of the impulse. Show your working. ii) Although the total distance the impulse travels in the reflex arc is less than 3m, the time taken is more than 0.04 seconds. Suggest why the time taken is more than expected. Identify two features of a synapse that mean that impulses can only travel in one direction.

5 a day revision B6 – Behaviour and simple reflexes What is behaviour? Name two examples of effectors in the body. What are the advantages and disadvantages of simple reflexes? What is behaviour? Give 3 examples of simple reflexes in humans. It has been suggested by some scientists that the iris reflex is an example of homeostasis. Explain why they may have suggested this.