How many Golgi tendon organs are there for 100 muscle fibers?
**Core Concept**
The Golgi tendon organ (GTO) is a proprioceptive sensory receptor located at the junction of skeletal muscle and tendon, involved in detecting changes in muscle tension. Each GTO is innervated by a group of muscle fibers, and the number of GTOs per muscle fiber is a specific ratio.
**Why the Correct Answer is Right**
For every 10-20 muscle fibers, there is one Golgi tendon organ. This ratio helps to monitor muscle tension and prevent excessive stretch or contraction, which can lead to muscle injury. The GTOs are sensitive to changes in muscle tension, sending signals to the central nervous system to regulate muscle contraction and relaxation. This feedback mechanism is essential for maintaining muscle homeostasis and preventing damage.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is too low, as there would be insufficient sensory feedback to regulate muscle contraction and relaxation.
**Option B:** This option is too high, as it would lead to over-sensitization of muscle tension and potential muscle injury.
**Option C:** This option is incorrect, as the ratio of GTOs to muscle fibers is not this high.
**Clinical Pearl / High-Yield Fact**
The Golgi tendon organ plays a crucial role in proprioception, and its dysfunction can lead to muscle imbalances and movement disorders. Understanding the ratio of GTOs to muscle fibers is essential for diagnosing and managing conditions such as muscle spasms and contractures.
**Correct Answer:** B. 5-10.