What is the difference between origin and insertion?

What is the difference between origin and insertion?

A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.

What are the two types of muscles?

In the muscular system, muscle tissue is categorized into three distinct types: skeletal, cardiac, and smooth. Each type of muscle tissue in the human body has a unique structure and a specific role. Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to pump blood.

What are the six ways muscles are named?

Terms in this set (6)

• direction. rectus abdominus (Rectus=parallel to midline)
• size. gluteus maximus (maximus=largest)
• shape. rhomboid major (rhomboid=diamond shaped)
• action. flexor carpi radialis (flexor=decreases joint angle)
• number of origins. biceps brachii (biceps=two origins)
• location.

Is there smooth muscle in the liver?

Although liver connective tissue cells have been recognized as analogous to smooth muscle cells, they represent a defined cell population, present in fibrotic livers, with specific behavior and with particular relationship to the extracellular matrix.

Is the heart a smooth muscle?

Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.

What is a smooth muscle blood test?

Smooth muscle antibodies (SMA) are autoantibodies, proteins produced by the body’s immune system that recognize and attack its own actin, a protein found in smooth muscle and other tissues, especially the liver. This test detects and measures the amount (titer) of SMA (or antibody against actin) in the blood.

Can fatty liver cause positive ANA?

Up to 30% of patients with non-alcoholic fatty liver disease (NAFLD) may have antinuclear antibodies (ANA). Low titre (<1:320) ANA positivity is not uncommon, but a high titre is rare. The ANA titre does not correlate with the histological grade of NAFLD.

Can vitamin D deficiency cause positive ANA?

Elevated ANA is sometimes found in healthy individuals, and has been consistently associated with female sex and older age (12-14). ANA positivity has been associated with vitamin D deficiency in autoimmune disease patients (15-17), but little is known about vitamin D and ANA in healthy populations.