CHAPTER 5.3/4 NEUROTRANSMITTERS IN LEARNING AND BEHAVIOUR

Question 1

What does the term Habituation mean and what happen with the influx/efflux of ions when this process takes place?

Answer 1

Habituation -Learned behaviour in which the response to a stimulus weakens with repeated presentations

Less calcium ions are influxed due to the decreased action potential resulting with less neurotransmitters being released at the presynaptic neuron

Question 2

What does the term Sensitisation and what happens with the influx/efflux of ions when this process takes place?

Answer 2

Sensitisation -Learned behaviour in which the response to a stimulus strengthens with repeated presentations.

Serotonin reduces the efflux of Potassium , prolonging the action potential which results in more Calcium ions influx which then results in causing a greater depolarization of the postsynaptic membrane after sensitisation

Question 3

What is an activating system?

Answer 3

Activating system - a neural pathway that coordinates brain activity through a single neurotransmitter