Final answer:
Kesha's new drug's side effects suggest it may be impacting her dopamine system, related to the extrapyramidal system and basal nuclei regulated by dopamine. the correct option is (b).
Step-by-step explanation:
Dopamine System:
Dopamine is a neurotransmitter that plays a crucial role in various functions, including motor control, mood regulation, and reward mechanisms.
Drugs that affect dopamine levels or receptor activity can lead to side effects such as muscular rigidity and tremors.
Options:
a. Episodic: Episodic memory is not related to the side effects described; it is associated with memory for personal experiences.
b. Dopamine: Correct. The symptoms of muscular rigidity and tremors are often associated with alterations in the dopamine system.
c. Endorphin: Endorphins are related to pain relief and mood regulation but are not directly associated with muscular rigidity and tremors.
d. GABA: GABA (gamma-aminobutyric acid) is an inhibitory neurotransmitter and is not typically associated with the described side effects.
Kesha's drug may be acting on her dopamine system based on the side effects of muscular rigidity and tremors.