Each skeletal muscle fiber is controlled by a neuron at a single _.
Correct answer: C. Neuromuscular junction
- A. Synaptic cleft
- B. Neuron
- C. Neuromuscular junction
- D. Both options B and C are correct
Explanation
The neuromuscular junction is the connection point between a motor neuron and a skeletal muscle fiber. When the motor neuron is stimulated, it releases the neurotransmitter acetylcholine, which binds to receptors on the muscle fiber, triggering muscle contraction. This one-to-one relationship ensures precise control of muscle fibers by individual motor neurons. Hence, C is the correct option
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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