The diagram above shows the set up similar to that used in Pavlov’s experiments on conditioning in dogs. Describe Pavlov’s experiments on conditioning in dogs.

Salivation is normally a simple reflex. Explain the role of sensory, relay and motor neurons in a simple reflex.

a. smell or sight of food provides the (unconditioned) stimulus at the start of the experiment;
b. salivation at the sight or smell of the food is the (unconditioned) response;
c. bell/other stimulus repeatedly applied just before food;
d. bell/other stimulus provides a (conditioned) stimulus;
e. (conditioned) response is salivation at the bell/other stimulus only;
f. experiment was an example of classical conditioning;
Award [2 max] if the terms stimulus and response are not used.

a. sensory neuron carries signal from sense organ/receptors/nose/eye to CNS;
b. motor neuron carries signal from CNS to effector/muscle/salivary gland;
c. relay neuron carries signal from sensory neuron to motor neuron;

Nearly all candidates had sound knowledge of Pavlov’s experiment, although many did not use the required terms.

There was poor knowledge of the exact functions of neurons.