Final answer:
Nicotine acts as a stimulant rather than a depressant. It can suppress appetite and may initially improve cognition, but does not inherently reduce aggression or memory. However, nicotine use is associated with significant health risks including heart disease and cancer.
Step-by-step explanation:
Understanding the effects of nicotine is crucial to recognizing its impact on the body's systems. Firstly, nicotine is not a CNS depressant, but rather, it acts as a stimulant by activating nicotinic acetylcholine receptors. The correct answers related to the question about the effects of nicotine are:
- c - Nicotine suppresses appetite. It can decrease hunger and food consumption.
- d - Nicotine improves cognition. Initially, it can enhance alertness and memory; however, chronic use may lead to cognitive deficits.
Contrary to some beliefs, nicotine does not necessarily reduce aggression and it has a complex relationship with memory whereby it may temporarily enhance certain aspects of cognition but potentially damage memory with long-term use. It's important to note the significant health risks associated with nicotine, such as increased chances of heart disease, stroke, and a variety of cancers.