Answer:
The answer to this question is A.
Explanation:
A motor unit consists of <u>a single motor neuron</u>.
<h3>What is a motor unit?</h3>
Most mature extrafusal skeletal muscle fibers in mammals are innervated by only a single alpha motor neuron. Since there are more muscle fibers by far than motor neurons, individual motor axons branch within muscles to synapse on many different fibers that are typically distributed over a relatively wide area within the muscle, presumably to ensure that the contractile force of the motor unit is spread evenly .
In addition, this arrangement reduces the chance that damage to one or a few alpha motor neurons will significantly alter a muscle's action. Because an action potential generated by a motor neuron normally brings to threshold all of the muscle fibers it contacts, a single alpha motor neuron and its associated muscle fibers together constitute the smallest unit of force that can be activated to produce movement.
Sherrington was the first to recognize this fundamental relationship between an alpha motor neuron and the muscle fibers it innervates, for which he coined the term motor unit.
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The laboratory can be improved by calibrating measurement tools and organizing the parts that help laboratory work.
<h3>What is lab organization?</h3>
The expression lab organization makes reference to the strategies used to improve our performance in the laboratory.
Labs must include different devices and tools such as eyewash devices, biosafety cupboards, emergency showers, etc.
In conclusion, the lab can be improved by calibrating measurement tools and organizing the parts that help laboratory work.
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<span>A) Glucose moving down a concentration gradient.</span>
Answer:
mitochondria
it produces energy, and the cells are animal cells
