Question
Which of the following is NOT a characteristic of muscular tissue?
This question was previously asked in
RRB ALP 2025 CBT 2 Machinist Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
Cardiac muscles are voluntary muscles.
Muscular Tissue Characteristics
Muscular tissue is essential for movement in living organisms. It is primarily composed of specialized cells known as muscle fibres (or myocytes), which possess the unique ability to contract and relax.
Analyzing Muscle Tissue Properties
Let's examine each statement regarding muscular tissue characteristics:
- Option 1: Voluntary muscles are also called skeletal muscles. This statement is accurate. Skeletal muscles are under conscious control, hence they are termed voluntary.
- Option 2: Muscles in limbs are voluntary muscles. This statement is correct. The muscles in our arms and legs, which allow us to move intentionally, are examples of voluntary skeletal muscles.
- Option 3: Muscular tissues are composed of muscle fibres. This is a fundamental characteristic. Muscle fibres are the basic cellular components of all muscle tissues.
- Option 4: Cardiac muscles are voluntary muscles. This statement is inaccurate.
Understanding Muscle Types
Muscular tissues can be categorized based on their structure and function:
- Skeletal Muscles: These are attached to bones and enable voluntary movements.
- Smooth Muscles: Located in the walls of internal organs like the stomach and blood vessels, these muscles function involuntarily.
- Cardiac Muscles: Exclusively found in the heart wall, these muscles are responsible for pumping blood through rhythmic contractions. Crucially, cardiac muscle functions involuntarily.
Identifying the Incorrect Characteristic
Since cardiac muscles operate automatically without conscious thought, they are classified as involuntary muscles. Therefore, the statement claiming cardiac muscles are voluntary is not a characteristic of muscular tissue.
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