Respuesta :
Answer:
a. the sweetened water.
Explanation:
According to the principles of classical conditioning, conditioned stimulus occur when the intended stimulus create similar response in an experiment to that of the unconditioned stimulus. In other words, they are responses triggered when associated with unconditioned stimulus.
Here, the sweetened water is an intented stimulus. It was given to the rats with an immune-enhancing drug to boost their immune systems. However, when the drug was removed, the rats still showed signs of enhanced immune system just with the sweetened water. It shows that the sweetened water has associated with the unconditioned stimulus, which is enhanced immune system functioning, and now triggers the same response even without the drug.
The sweetened water is the conditioned stimulus in the experiment done with the rats. Rats responded positively with the consumption of such water which led to boosting their immunity.
Rats had been given only sweetened water with a drug that boosted their immunity during the first week of the experiment. However when drug was not consumed, their immunity was affected negatively.
- In most of the experiments that are dealt with drugs, mostly such experiments are conducted by testing rats and noticing their reactions over conduction of such experiment.
- The conduction of such experiments tells or helps in identifying whether it will be suitable for human consumption or how it will react upon human consumption.
- Conditioned stimulus refers to a medium of experiment which is the main focus of such experiment and the medium through which the final results can be analyzed.
Hence, in our experiment with rats the conditioned stimulus was sweetened water where it was mixed with immune-system enhancing drug.
To know more about conditioned stimulus, click the link below
https://brainly.com/question/24868138