The right answer is False. (An important element missing from the definition of motor unit are motor neurons.)
A motor unit is composed of an alpha motor neuron and the muscle fibers it innervates.
Groups of motor units often work together to coordinate the contractions of a single muscle. All motor units that serve the same muscle are considered to be a group of motor units. The number of muscle fibers connected to each unit can vary: the muscles of the thigh can have up to a thousand fibers per unit, the muscles of the eyes can have only ten. In general, the number of muscle fibers involved in a motor unit is a function of the muscle's need for its refined movement: the more the muscle will need a fine movement, the less the motor unit will involve synapses with the muscle fibers.
Answers:
1. Three problems associated with alcohol
a. High blood pressure
b. Liver and kidney disease or cancer
c. Heart diseases
2. “The direct answer to this question is that the government does not decide the legal status of drugs based on scientific assessment of potential for harm.
The ranking of drugs is a very interesting and controversial topic (subject to the apples and oranges problem), but it is simply not the basis by which governments make these decisions. The chart is worth analyzing, but it won't answer the question.
Practically speaking, making alcohol illegal is untenable. It was attempted in the United states in the 1920s, and I am not aware of any credible historians that consider prohibition to have been a success. Alcohol use has been present amongst humankind for millennia. It spans society, race, social class, etc. It does certainly present great potential for harm, individually through the detrimental health effects of abuse, and societally through the impact of impaired decision making, most notably drunk driving.
Despite that, alcohol also clearly provides some benefits that drive some people to use it. Others choose not to use it at all. Many use it without issue, and some develop problems. It is an effective social lubricant. In many cultures it is a common component of traditional celebrations, and in some cultures it is even a component of formal business interactions. It is one of the central rituals in the Catholic church.
Many of the problems associated with alcohol use can be reasonably mitigated without blanket prohibition, i.e. drunk driving and age restrictions. Many of the problems are also solved through basic social structures, in which friends and family address issues independently.
Given the above, the clear follow-on question is why these other, less harmful, drugs are illegal? If alcohol has demonstrated that it is actually more effective to manage these problems with regulation, how are other legalization decisions being made?
Those are much more complicated questions. The brief answers have to do with legacy (less history of widespread human use with other chemicals) and institutional racism.”
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Stuff like this is what gets you banned.