It is like a dug because there is a change in the brain cells that grow more adenosine receptors, which is the brain’s attempt to maintain equilibrium in the face of a constant onslaught of caffeine, with its adenosine receptors so regularly plugged. This explains why regular coffee drinkers build up a tolerance over time, it takes more caffeine to block a significant proportion of them and achieve the desired effect which is why it is so addicting. It is not as bad as a worse drug because the effects of caffeine are relatively short-term. Caffeine is a stimulant that affects the nervous system in various ways.

7 0

3 years ago

Underline each verb. Tell whether it is an action verb or linking verb on the line provided.

Vladimir79 [104]

1. Science fiction fascinates me. action verb

2. Space movies are the best. linking verb

3. The special effects are awesome! linking verb

4. The captain vanishes.  action verb

5. We find him on a planet. action

6. His ship flashes past the stars. action verb

Here is the list: Be, am, is, are, was, were, has been, any other form of the verb “be”, become, and seem. There are other verbs that can be both linking verbs and action verbs. All of the sense verbs; look, smell, touch, appear, sound, taste, and feel can be linking verbs.

7 0

4 years ago