Which are the special proteins in muscles that contract and relax to cause movement?

 

The formed elements are so named because they are enclosed in a plasma membrane and have a definite structure and shape.

The formed elements in the blood are Erythrocytes (RBC's), Leukocytes (WBC's) and Thrombocytes (Platelets).

Mitochondria are organelles that generate most of the chemical energy needed to power the cell's biochemical reactions. Hence, thay are also called as Power house of the cell.

* Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

Involuntary muscles are the muscles which contract without conscious control whereas Voluntary muscles are the muscles that help you walk, talk, pick up things, jump and do all the basic or complex movements you do everyday with your consciousness.

* The contraction in the involuntary muscles is controlled by the autonomic nervous system. These are present in the walls of the digestive system, blood vessels, bronchi, uterus and bladder.

* Voluntary muscles are mostly located in the arms ,legs ,hands, and feet.

Narcolepsy is a disorder in which a person has excessive daytime sleepiness, sleep/wake disorder.