Final answer:
Smoking tobacco has short-term effects on the nervous system including increased heart rate, restricted blood flow, and impaired cognitive functions.
Step-by-step explanation:
When smoking tobacco, there are several short-term effects on the nervous system. Nicotine, the addictive component of tobacco, acts as a stimulant and quickly enters the bloodstream. It binds to nicotine receptors in the brain, releasing dopamine and producing pleasurable feelings.
Additionally, smoking tobacco causes a temporary increase in heart rate and blood pressure, as well as narrowing of blood vessels. This restricts blood flow, including to the brain, which can lead to dizziness and lightheadedness.
Furthermore, smoking can affect cognitive functions such as attention, memory, and concentration. It can impair decision-making abilities and reaction times, making it harder for individuals to perform complex tasks.
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