Store house of calcium ions in the skeletal muscle is

Options

A. Sarcolemma
B. Sarcoplasm
C. Sarcoplasmic reticulum
D. Sarcosome.

Answer

To solve the question "Store house of calcium ions in the skeletal muscle is", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of Skeletal Muscle**:
- Skeletal muscle is made up of muscle fibers, which are further organized into bundles. Each muscle fiber has specific structures that play important roles in muscle contraction and function.

2. **Identify the Options**:
- The options given are:
- A) Sarcolemma
- B) Sarcoplasm
- C) Sarcoplasmic reticulum
- D) Sarcosome

3. **Define Each Option**:
- **Sarcolemma**: This is the plasma membrane of a muscle fiber. It surrounds the muscle fiber but does not store calcium ions.
- **Sarcoplasm**: This is the cytoplasm of a muscle cell, containing various organelles and substances, but it is not specifically the storage site for calcium ions.
- **Sarcoplasmic Reticulum**: This is a specialized form of the endoplasmic reticulum in muscle cells. It plays a crucial role in muscle contraction by storing and releasing calcium ions.
- **Sarcosome**: This term is not commonly used in muscle physiology and does not refer to a structure that stores calcium ions.

4. **Determine the Correct Answer**:
- Among the options, the **sarcoplasmic reticulum** is specifically known for its role in storing calcium ions (Ca²⁺) that are essential for muscle contraction. Therefore, the correct answer is **C) Sarcoplasmic reticulum**.

### Final Answer:
The storehouse of calcium ions in the skeletal muscle is **C) Sarcoplasmic reticulum**.

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