Muscular Anatomy Flashcards
What is the role of tropomyosin in muscle contraction ?
To prevent myosin from continuing to slide up the actin filament
What is the role of acetylcholine in calcium release ?
It stimulates cellular contraction by opening voltage-gated ion channels
What are the three types of muscles ?
skeletal, cardiac and smooth
What is the role of skeletal muscles ?
They help us move
What is the role of cardiac muscles ?
They make our heart beat
Where are smooth muscles located ?
They are located in hollow organs and blood vessels
Are skeletal muscles involuntary or voluntary ?
Voluntary
Are cardiac muscles involuntary or voluntary ?
Involuntary
Do smooth muscles work automatically ?
Yes
Skeletal muscles have…
thin myofilaments made of actin and regulatory proteins
What is the term that is associated with poneurosis ?
Tendon
What is hypertrophy ?
Increase in size of muscle
What is atrophy ?
Decrease in size of muscle
What is a skeletal muscle contraction ?
An increase in the tension or a decrease in the length of a skeletal muscle
What are tendons ?
Tendons are bundles of collagen fibers that attach skeletal muscles to bone
What are z-discs ?
They are structures that mark the end of a sarcomere in a muscle fiber. They are attached to actin filaments.
What is the muscular system ?
It is the organ system that consists of all muscles in the body.
What are the two systems that work with the muscular system to to carry out movements ?
Skeletal system and Nervous system
Which type of muscle does not have visible striations ?
Smooth muscle
Where do muscles attach ?
Tendon
