Tag: muscle tissues

Epithelial tissues line the outer surface of organs and blood vessels throughout the body, as well as the inner surface of cavities in many internal organs. The human skin has up to seven layers of ectodermal tissues and guards the underlying muscles, Bones, etc.

Myoglobin is similar to hemoglobin in a way that both are oxygen-carrying protein but in a different location. It can bind to only one molecule of oxygen because it is a monomeric protein.

Keratin is a family of fibrous structural proteins. It is the protein that protects epithelial cells from damage or stress that has potential to kill the cell.

Aerobic respiration gives more energy but is a slow process. Anaerobic respiration like lactic acid fermentation is a fast process but releases less energy. In the case of rapid muscular contraction, the muscles perform lactic acid fermentation to provide for rapid energy intake. This process releases lactic acid which causes pain and muscle fatigue. So, the correct answer is option B.

Muscles have two major proteins actin and myosin. These are mostly contractile proteins. The energy from the hydrolysis of ATP by myosin head is directly used in the power stroke i.e., flexing of myosin head during muscular contraction. ATP is also used during muscle relaxation in the absence of ATP the myosin head will continue to bind with actin head and the muscle fibre shall remain contracted. So, the correct answer is option C.

Epithelial tissues are meant for covering and protecting the body, organs and cavities. They are not involved in body movements.
Bones form the framework of the body. They are hard and rigid. To carry out body movement property of contraction and relaxation is necessary. But bones can not contract.
Tendon is a tough fibrous connective tissue, which connects muscle to bone. Tendon does not have the property of contraction and relaxation. The ligament is a fibrous connective tissue, which connects bone to another bone. It is flexible but is not present throughout the body to carry out body movement.
Muscular tissues possess the property of contraction and relaxation. They are attached to bones. With the help of bones, muscular tissue carries out body movement. Therefore, option A is correct. 

Epithelial tissue is meant for covering and protecting the body, organs and cavities. They do not possess the property of contraction and relaxation. 
Connective tissue connects, supports and separates the organs in the body. These are present in different forms as fluid, jelly-like rigid, hard forms. 
Nervous tissue is meant for rapid transmission of the signals from one place to another. These tissues do not contract or relax.

Sarcoplasm is the cytoplasm of muscle cells or myocytes. Large amounts of glycosomes and significant amounts of myoglobin are usually found in the sarcoplasm.