Which statement best describes the effect nicotine has on the central nervous system? select one of the options below as your

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.

The correct answer is:

C. It acts as both a stimulant and a sedative

Explanation:

Once the nicotine is in the brain it stimulates receptors called cholinergic receptors. These receptors are adequate in other areas of the body such as the muscles, heart, adrenal glands, and other important organs. Nevertheless, these receptors are usually activated when they bind to a neurotransmitter called acetylcholine, which is produced in nerve endings of the brain and in the nerves of the PNS. Unlike acetylcholine, nicotine enters the brain and prevents its regular functioning.

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i believe it would be the lungs.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.