Which statement best describes the effect nicotine has on the central nervous system?
A.
It acts as a stimulant and causes pleasurable feelings.
B.
It acts as a sedative and relaxes the mind.
C.
It acts as both a stimulant and a sedative.
A. It acts as a stimulant and causes pleasurable feelings.
Prolonged and constant use of tobacco can weaken the user's immune system and increase the risk of many diseases.
Which disease makes the air sacs in the lungs less elastic, reducing their ability to absorb oxygen?
A.
chronic bronchitis
B.
emphysema
C.
lung cancer
D.
oral cancer
B. Emphysema
Which is a likely result of taking LSD?
A.
raised heart rate and sped-up nervous system
B.
altered mood and sensory perceptions
C.
reduced heart rate and loss of inhibitions
B. Altered mood and sensory perceptions.
When you experience changes in light, sound, and temperature, which cells send signals toward the central nervous system?
A. dendrites
B. sensory neurons
C. axons
When you experience changes in light, sound, and temperature, which cells send signals toward the central nervous system?
A.
Dendrites
B.
Sensory neurons
C.
Axons
B. Sensory neurons.
To determine the effect of nicotine on the central nervous system, we can analyze the options provided and choose the one that best describes its effects.
Option A states that nicotine acts as a stimulant and causes pleasurable feelings. This is an accurate description of the effects of nicotine on the central nervous system. Nicotine stimulates the release of certain neurotransmitters in the brain, including dopamine, which can lead to feelings of pleasure and reward.
Option B states that nicotine acts as a sedative and relaxes the mind. This is not an accurate description of the effects of nicotine. While nicotine may have a calming effect in some individuals, it primarily acts as a stimulant rather than a sedative.
Option C states that nicotine acts as both a stimulant and a sedative. While nicotine can vary in its effects depending on the individual and the dosage, the most common and consistent effect of nicotine on the central nervous system is stimulation rather than sedation. Therefore, option A, which states that nicotine acts as a stimulant and causes pleasurable feelings, would be the best choice to describe the effect of nicotine on the central nervous system.