Question

Which of the following is/are not correct in context to connective tissues?
(i) Areolar connective tissue is found in the bone marrow.
(ii) The ground substance of connective tissue is a mixture of only carbohydrates and proteins.
(iii) Lymph is a type of connective tissue.
(iv) Connective tissue acts as a shock absorber around eyeballs and kidneys.

A. (i) and (iii)
B. (i), (ii) and (iii)
C. Only (ii)
D. Only (iv)

Answer 1

Hint: In the body, Connective tissue is the tissue that connects, separates, and supports all other types of tissues. It is surrounded by a compartment of fluid called the extracellular matrix (ECM). The three types of connective tissue fibers are: Collagen fibers, Elastic fibers, Reticular fibers.

Complete answer:
The areolar tissue is a loose connective tissue that can be observed in various parts of the human body. It is present between the skin and muscles; in the bone marrow as well as around the blood vessels and nerves.

The ground substance of connective tissue is a transparent material with the properties of a viscous solution. Its constituents are large carbohydrate molecules or complexes of protein and carbohydrate, called glycosaminoglycans (formerly known as mucopolysaccharides) and also composed of glycosaminoglycans, proteoglycans, and glycoproteins

Blood and lymph are fluid connective tissues. Lymph flows through the lymphatic system. It is a system composed of lymph vessels and lymph nodes whose function is to return fluid from the tissues to the central circulation.

Adipose tissue is an aggregation of fat cells. The adipose tissue is present below the skin, between the internal organs, and in the yellow bone marrow. It keeps visceral organs in position. It forms shock-absorbing cushions around kidneys and eyeballs.

Hence, the correct answer is option (C).

Note: Areolar tissue is found in various parts of the body including bone marrow. The ground substance of the connective tissue is mainly composed of glycosaminoglycans, proteoglycans, and glycoproteins. Lymph is the fluid that flows through lymphatic tissues and is a part of connective tissues. Adipose tissue stores fat. It is present near eyeballs and kidneys and it acts as a shock absorber.