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Alona [7]
2 years ago
7

Which of the following statements is NOT true about alcohol?

Health
2 answers:
Flura [38]2 years ago
8 0

Answer : Option B) Alcohol is a depressant, which means it speeds up the nervous system.

Explanation : Alcohol is a nervous system depressant which slows down the central nervous system and peripheral nervous system activities. It is also an active brain drug and a cellular toxin before it is metabolized by the body enzymes.

Alcohol is produced by fermenting grain, fruits or vegetables for several months or years. When packed in cans or bottles, the label which shows the alcohol content is expressed as alcohol percent.

larisa86 [58]2 years ago
5 0

Answer:

B) alcohol is a depressant, which means is speeds up the nervous system

Explanation:

Alcohol is a central nervous system (CNS) depressant psychotropic substance that promotes simultaneous alteration of numerous neuronal pathways, generating various biological and behavioral changes.  Is speeds DOWN the nervous system.

The Alcohol intake causes several effects, which appear in 2 distinct phases: a stimulant and a depressant. In the first moments after drinking alcohol, stimulating effects may appear, such as euphoria, disinhibition and loquacity (easier to speak). Over time, depressing effects such as poor motor coordination, uncontrollability, and sleepiness begin to emerge.

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All cells share four common components: (1) a plasma membrane, an outer covering that separates the cell’s interior from its surrounding environment; (2) cytoplasm, consisting of a jelly-like region within the cell in which other cellular components are found; (3) DNA, the genetic material of the cell; and (4) ribosomes, particles that synthesize proteins. However, prokaryotes differ from eukaryotic cells in several ways.



Figure 1. This figure shows the generalized structure of a prokaryotic cell.

A prokaryotic cell is a simple, single-celled (unicellular) organism that lacks a nucleus, or any other membrane-bound organelle. We will shortly come to see that this is significantly different in eukaryotes. Prokaryotic DNA is found in the central part of the cell: a darkened region called the nucleoid (Figure 1).

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In nature, the relationship between form and function is apparent at all levels, including the level of the cell, and this will become clear as we explore eukaryotic cells. The principle “form follows function” is found in many contexts. It means that, in general, one can deduce the function of a structure by looking at its form, because the two are matched. For example, birds and fish have streamlined bodies that allow them to move quickly through the medium in which they live, be it air or water.

A eukaryotic cell is a cell that has a membrane-bound nucleus and other membrane-bound compartments or sacs, called organelles, which have specialized functions. The word eukaryotic means “true kernel” or “true nucleus,” alluding to the presence of the membrane-bound nucleus in these cells. The word “organelle” means “little organ,” and, as we learned earlier, organelles have specialized cellular functions, just as the organs of your body have specialized functions.

Cell Size

At 0.1–5.0 µm in diameter, prokaryotic cells are significantly smaller than eukaryotic cells, which have diameters ranging from 10–100 µm (Figure 2). The small size of prokaryotes allows ions and organic molecules that enter them to quickly spread to other parts of the cell. Similarly, any wastes produced within a prokaryotic cell can quickly move out. However, larger eukaryotic cells have evolved different structural adaptations to enhance cellular transport. Indeed, the large size of these cells would not be possible without these adaptations. In general, cell size is limited because volume increases much more quickly than does cell surface area. As a cell becomes larger, it becomes more and more difficult for the cell to acquire sufficient materials to support the processes inside the cell, because the relative size of the surface area across which materials must be transported declines.



Figure 2. This figure shows the relative sizes of different kinds of cells and cellular components. An adult human is shown for comparison.

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