Question

Ligament is mainly formed of
A) Collagen
B) Elastin
C) Reticulin
D) Myosin

Answer 1

Hint: Ligament is the connecting bridge between bones and cartilages for strengthening the bone joints.

Complete Answer:
Ligament, also known as articular laura or articular ligament or true ligament is a connecting bridge existing between two bones.

Option a: Ligaments are fibrous connective tissues just like tendons but they connect bones to other bones. These represent a band of dense bundles of connective tissues composed of the collagen fibres. The connective tissue bundles are further protected by the presence of numerous dense irregular sheaths of the connective tissues. Therefore, this is the correct option.

Option b: Elastin is a protein present within the extracellular matrix allowing many tissues within the human body to resume to their original shape by undergoing stretching or contracting. Therefore, this is the incorrect option.

Option c: Reticulin or reticular fibres are types of connective tissue fibres consisting of type III collagen which are secreted by your reticular cells. These fibres crosslink to form a fine system of meshwork. Therefore, this is the incorrect option.

Option d: Myosin are motor proteins known for their participation in muscle contraction and numerous eukaryotic motility processes. Therefore, this is the incorrect option.

Thus, the correct option is a) Collagen.

Note: Three main types of ligament exists within human body –
1) Fetal remnant ligament – These form the remnants of the fetal tubular structure.
2) Peritoneal ligament – This represents a form of fold either of peritoneum or other membranes.
3) Periodontal ligament – This is a group of fibres attaching the teeth cementum to its surrounding alveolar bone.