Question

Assertion (A): Muscular tissue consists of elongated cells, also called muscle fibres. This tissue is

responsible for movement in our body.
Reason (R): Muscles contain special proteins called contractile proteins, which contract and relax to cause movement.

(a) Both (A) and (R) are true and (R) is correct explanation of the assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.​

Answer 1

The correct answer is option a. Muscular tissue is made up of elongated muscle fibers that contract due to contractile proteins, such as actin and myosin, to cause movement. Both the assertion and reason in the student's question are correct and the reason does explain the assertion correctly.

Step-by-step explanation:

The muscular system is an essential part of the human body, enabling both voluntary and involuntary movements. Muscle tissue consists of specialized cells known as muscle fibers, capable of contracting and generating movement. These fibers contain contractile proteins named actin and myosin, which interact to facilitate contraction and relaxation, thus causing movement. This process is vital for all bodily functions, from locomotion to the functioning of internal organs.

Given the information provided, both the assertion that muscular tissue consists of elongated cells, also called muscle fibers, responsible for movement in our body, and the reason that muscles contain contractile proteins, which contract and relax to cause movement, are correct. However, the reason provided is indeed a correct explanation for the assertion. Therefore, the correct option for the question provided by the student is:

(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.