Direction: In the following questions, a statement of assertion (A) is...
- Assertion (A): True. Bone and cartilage are types of connective tissue. They support and protect the body, with bone being hard and rigid, while cartilage is more flexible.
- Reason (R): True. Blood is indeed a connective tissue, and the plasma serves as its matrix, providing a medium for transporting nutrients, waste, and cells.
- The reason does not explain why bone and cartilage are connective tissues; it describes blood instead.
Thus, the correct choice is A: Both assertion and reason are true, but reason is not the correct explanation of assertion.
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Direction: In the following questions, a statement of assertion (A) is...
Assertion: Bone and cartilage are rigid connective tissue.
Reason: Blood is connective tissue in which plasma is the matrix.
The correct answer is option 'B': Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Explanation:
Connective Tissue:
Connective tissue is one of the four main types of tissues in the human body. It provides support, structure, and protection to various organs and tissues. Connective tissue consists of cells embedded in an extracellular matrix, which can vary in composition depending on the type of connective tissue.
Bone and Cartilage:
Bone and cartilage are two types of connective tissue that have a rigid structure.
- Bone: Bone is a type of connective tissue that forms the skeletal system of the human body. It is a rigid tissue that provides support, protection, and movement to the body. Bone is composed of cells called osteocytes embedded in a matrix that consists of collagen fibers and calcium salts. The matrix gives bone its hardness and rigidity.
- Cartilage: Cartilage is another type of connective tissue that is more flexible than bone but still provides support to various structures in the body. It is found in the joints, nose, ears, and other parts of the body. Cartilage is composed of cells called chondrocytes embedded in a matrix that is rich in collagen fibers. The matrix gives cartilage its flexibility and resilience.
Blood:
Blood is also a connective tissue, but it has a different composition compared to bone and cartilage. The matrix of blood is called plasma, which is a clear, yellowish fluid that makes up about 55% of the total blood volume. Plasma contains water, proteins, hormones, electrolytes, and other substances. It does not provide rigidity like the matrix of bone and cartilage.
Explanation of the Assertion and Reason:
The assertion states that bone and cartilage are rigid connective tissue, which is true. Both bone and cartilage have a firm and rigid structure that provides support and protection to various parts of the body.
The reason given is that blood is a connective tissue in which plasma is the matrix. This statement is also true. Blood is a connective tissue, but its matrix, which is plasma, does not provide rigidity like the matrix of bone and cartilage.
Therefore, the reason does not explain the assertion correctly. The reason explains the composition of blood and its matrix, but it does not provide a direct explanation for why bone and cartilage are rigid connective tissue.
In conclusion, both the assertion and the reason are true, but the reason is not the correct explanation of the assertion. Hence, the correct answer is option 'B'.
Direction: In the following questions, a statement of assertion (A) is...
- Assertion (A): True. Bone and cartilage are types of connective tissue. They support and protect the body, with bone being hard and rigid, while cartilage is more flexible.
- Reason (R): True. Blood is indeed a connective tissue, and the plasma serves as its matrix, providing a medium for transporting nutrients, waste, and cells.
- The reason does not explain why bone and cartilage are connective tissues; it describes blood instead.
Thus, the correct choice is A: Both assertion and reason are true, but reason is not the correct explanation of assertion.
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