Skeletal Muscle
The best-known feature of skeletal muscle.
What is its ability to contract and cause movement?
Cardiac muscle can only be found here.
What is the heart?
Smooth muscle is so-named because it lacks these.
What are striations?
The three main types of skeletal muscle fibers.
What are slow oxidative, fast oxidative, and fast glocolytic?
When signaled by a motor neuron, a skeletal muscle fiber contracts as the thin filaments are pulled and then slide past the thick filaments within the fiber’s sarcomeres. This process is known as ______.
What is the sliding filament model of muscle contraction?
Skeletal muscles contribute to this in the body by generating heat.
What is homeostasis?
This allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump.
What is intercalated disc?
The name of the connective tissue that smooth muscle produces.
What is endomysium?
Glycolytic fibers primarily create ATP through this process.
What is anaerobic glycolysis?
As actin is pulled, the filaments move approximately 10 nm towards the M-line. This movement is called ______________.
What is the powerstroke?
Muscle fibers that are organized into individual bundles.
What are fascicles?
These two structures are important in cardiac muscle contraction.
What are gap junctions and desmosomes?
Analogous to the Z-discs of cardiac and skeletal muscle fibers and is fastened to the sarcolemma.
What is a dense body?
FO fibers are oxidative because they produce ATP aerobically, possess high amounts of mitochondria, and they do not __________________.
What is fatigue quickly?
This is released after the power stroke.
What is ADP?
The striated appearance of skeletal muscle fibers is due to the arrangement of these myofilaments.
What are actin and myosin?
Cells that are self-excitable and able to depolarize to threshold and fire action potentials on their own.
What are pacemaker cells?
In smooth muscle, the cross-bridge formation is regulated by this regulatory protein.
What is calmodulin?
FG fibers are used to produce rapid, forceful ___________to make quick, powerful movements.
What are contractions?
A molecule that can store energy in its phosphate bond.
What is creatine phosphate?
A special type of electrical signal that can travel along a cell membrane as a wave.
What is action potential?
The pacemaker cells respond to signals from this system.
What is the autonomic nervous system?
Smooth muscle is not under voluntary control, thus it is called.....
What is involuntary muscle?
FO fibers are used primarily for _________________.
What are movements?
The breakdown of glucose or other nutrients in the presence of oxygen (O2) to produce carbon dioxide, water, and ATP. Approximately 95 percent of the ATP required for resting or moderately active muscles is provided by aerobic respiration, which takes place in mitochondria.
What is aerobic respiration?