Animal Tissues: Muscular Tissue MCQs Quiz | Class 9
This Class IX Science (Code 086) quiz covers Unit II: Organization in the Living World, focusing specifically on Muscular Tissue. Test your knowledge on the types of muscles (striated, smooth, cardiac), their structures, locations, and functions. Click ‘Submit Quiz’ to check your answers and ‘Download Answer PDF’ to save your results.
Overview of Muscular Tissue
Muscular tissue consists of elongated cells, also called muscle fibers. This tissue is responsible for movement in our body. Muscles contain special proteins called contractile proteins, which contract and relax to cause movement.
Types of Muscular Tissue
Muscular tissues are classified into three types based on structure, location, and function:
1. Striated (Skeletal or Voluntary) Muscles
- Structure: Long, cylindrical, unbranched, and multinucleate (having many nuclei). They show alternate light and dark bands (striations).
- Location: Attached to bones (limbs, body wall, face).
- Function: Voluntary movements (movements under our conscious control) and locomotion.
2. Smooth (Unstriated or Involuntary) Muscles
- Structure: Spindle-shaped (pointed at ends), uninucleate (single nucleus), and lack striations.
- Location: Iris of the eye, ureters, bronchi of lungs, alimentary canal (stomach, intestines), and blood vessels.
- Function: Involuntary movements like peristalsis in the food pipe or contraction of blood vessels.
3. Cardiac Muscles
- Structure: Cylindrical, branched, and uninucleate. They have faint striations.
- Location: Found exclusively in the heart walls.
- Function: Rhythmic contraction and relaxation throughout life to pump blood. They are involuntary in nature.
Comparison Table
| Feature | Striated | Smooth | Cardiac |
|---|---|---|---|
| Shape | Cylindrical | Spindle | Cylindrical |
| Nucleus | Multinucleate | Uninucleate | Uninucleate |
| Control | Voluntary | Involuntary | Involuntary |
| Branching | Unbranched | Unbranched | Branched |
Quick Revision Points
- Voluntary muscles are those we can move by conscious will.
- Involuntary muscles function automatically without conscious control.
- Intercalated discs allow cardiac muscle cells to contract as a unit.
- Peristalsis is the rhythmic pushing of food in the gut, caused by smooth muscles.
Extra Practice Questions
- Why are skeletal muscles called striated muscles?
- Differentiate between the location of smooth and cardiac muscles.
- Which muscle type never gets fatigued?
- What is the specific function of contractile proteins?
- Identify the tissue present in the iris of the eye.
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