With reference to muscular tissues, consider the following statements: 1. Striated muscles are uninucleate and involuntary. 2. Smooth muscles are uninucleate and involuntary. 3. Cardiac muscles are branched, uninucleate, and involuntary. Which of the statements given above are correct?

Correct Option The correct option is (c) 2 and 3 only. Explanation Muscular tissues in animals are classified into three types based on their structure, location, and function: Skeletal (Striated), Smooth (Non-striated), and Cardiac muscles. These tissues differ in terms of their voluntary control, nucleation, and structural appearance (striations and branching). Statement-wise Analysis - Statement 1 is Incorrect. Striated muscles, also known as skeletal muscles, are primarily attached to bones and assist in body movement. They are voluntary in nature (controlled by conscious will) and are structurally long, cylindrical, unbranched, and multinucleate (containing many nuclei). - Statement 2 is Correct. Smooth muscles are found in the walls of internal hollow organs such as the stomach, intestine, and blood vessels. They are involuntary (not under conscious control). Structurally, they are fusiform (tapered at both ends), non-striated, and uninucleate (single nucleus). - Statement 3 is Correct. Cardiac muscles are found exclusively in the heart. They are involuntary in nature. Structurally, cardiac muscle fibers are cylindrical, branched, and typically uninucleate. They also possess intercalated discs which allow for rapid signal transmission. Key Takeaway Skeletal muscles are voluntary and multinucleate; Smooth muscles are involuntary and uninucleate; Cardiac muscles are involuntary, branched, and uninucleate.

With reference to muscular tissues,… - NCERT Class 9 Science MCQ

NCERT Class 9 Science — Chapter 2: Tissues

mcqmedium

With reference to muscular tissues, consider the following statements:

Striated muscles are uninucleate and involuntary.
Smooth muscles are uninucleate and involuntary.
Cardiac muscles are branched, uninucleate, and involuntary.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Science - class 9 · Page 68

Options

A1 and 2 only
B2 only
C2 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c) 2 and 3 only.

Explanation

Muscular tissues in animals are classified into three types based on their structure, location, and function: Skeletal (Striated), Smooth (Non-striated), and Cardiac muscles. These tissues differ in terms of their voluntary control, nucleation, and structural appearance (striations and branching).

Statement-wise Analysis

Statement 1 is Incorrect.
Striated muscles, also known as skeletal muscles, are primarily attached to bones and assist in body movement. They are voluntary in nature (controlled by conscious will) and are structurally long, cylindrical, unbranched, and multinucleate (containing many nuclei).
Statement 2 is Correct.
Smooth muscles are found in the walls of internal hollow organs such as the stomach, intestine, and blood vessels. They are involuntary (not under conscious control). Structurally, they are fusiform (tapered at both ends), non-striated, and uninucleate (single nucleus).
Statement 3 is Correct.
Cardiac muscles are found exclusively in the heart. They are involuntary in nature. Structurally, cardiac muscle fibers are cylindrical, branched, and typically uninucleate. They also possess intercalated discs which allow for rapid signal transmission.

Key Takeaway

Skeletal muscles are voluntary and multinucleate; Smooth muscles are involuntary and uninucleate; Cardiac muscles are involuntary, branched, and uninucleate.

Your note

More from Chapter 2: Tissues

Consider the following statements regarding 'Complex Permanent Tissues': 1. They are made of more than one type of cell. 2. Each cell in the tissue functions independently without coordination. 3. Xylem and Phloem are examples of complex tissues. Which of the statements given above is/are correct?

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Consider the following statements about epithelial tissue: 1. It forms a barrier to keep different body systems separate. 2. It is directly connected to the underlying tissue without any separating membrane. 3. It contains large intercellular spaces to facilitate the movement of materials. Which of the statements given above is/are correct?

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Consider the following statements about 'Smooth Muscles': 1. They are also known as striated muscles. 2. They control involuntary movements like the movement of food in the alimentary canal. 3. They are multinucleate. Which of the statements given above are correct?

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With reference to the fundamental differences between plants and animals, consider the following statements: 1. Plants have a large quantity of supportive tissue which generally consists of dead cells. 2. Growth in plants is uniform throughout the body, whereas in animals it is limited to specific regions. 3. Animals consume more energy compared to plants due to active locomotion. Which of the statements given above is/are correct?

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Which one of the following is the most appropriate reason for the skin being made of 'Stratified Squamous Epithelium'?

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