Ratio of motor units to number of muscle fibers in striated muscle of eyes is?
**Core Concept**
The question is testing the concept of motor unit composition in striated muscles, specifically those of the eye. Striated muscles, including those of the eye, are composed of motor units, which are groups of muscle fibers innervated by a single motor neuron.
**Why the Correct Answer is Right**
The correct answer is related to the anatomy of the extraocular muscles, which are responsible for eye movements. The extraocular muscles are unique in that they have a high ratio of motor units to muscle fibers, allowing for precise and controlled movements of the eye. This is due to the small size of the extraocular muscles and the need for precise control over eye movements. The correct answer reflects this anatomical and physiological adaptation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately reflect the motor unit composition of striated muscles in the eye. The ratio of motor units to muscle fibers in the extraocular muscles is significantly higher than in other muscles.
**Option B:** This option is incorrect because it is not specific to the striated muscles of the eye. The motor unit composition of muscles in other parts of the body may vary significantly from those in the eye.
**Option C:** This option is incorrect because it is a general statement that does not accurately reflect the motor unit composition of striated muscles in the eye. The ratio of motor units to muscle fibers in the extraocular muscles is unique and not representative of other muscles.
**Option D:** This option is incorrect because it does not accurately reflect the motor unit composition of striated muscles in the eye. The correct answer is specific to the anatomy and physiology of the extraocular muscles.
**Clinical Pearl / High-Yield Fact**
A key takeaway from this concept is that the extraocular muscles have a unique motor unit composition that allows for precise control over eye movements. This is an important consideration in the diagnosis and treatment of eye movement disorders.
**Correct Answer:** C. 5:1