Fechar
What term refers to a smooth, sustained contraction?
What type of exercise causes increase in muscle size?
What term refers to the movable attachment of a muscle?
Which layer of connective tissue surrounds each skeletal muscle fiber?
There are three types of muscle tissue. Which of the following is classified as part of the muscular system?
What initiates an action potential on a muscle cell?
What mineral is released within muscle cells to trigger contraction?
What is the function of creatine phosphate?
Which of these sets of terms is NOT a pair of opposites?
A.) dorsiflexion and plantar flexion
B.) pronation and supination
C.) inversion and eversion
D.) opposition and supposition
What metabolic waste accumulates in muscle with excessive exertion?
Which of these characteristics applies only to cardiac muscle tissue
The majority of the fibers of the gluteus maximus insert onto the __________.
The gluteus maximus is the most powerful muscle during __________.
The two heads of the biceps brachii combine to insert on the __________.
Which of these muscles is located in the neck?
The cross bridge cycle is a series of molecular events that occur after excitation of the sarcolemma. What is a cross bridge?
What structure is the functional unit of contraction in a skeletal muscle fiber?
Calcium ions couple excitation of a skeletal muscle fiber to contraction of the fiber. Where are calcium ions stored within the fiber?
After a power stroke, the myosin head must detach from actin before another power stroke can occur. What causes cross bridge detachment?
How does the myosin head obtain the energy required for activation?
What specific event triggers the uncovering of the myosin binding site on actin?
When does cross bridge cycling end?
ALS (amyotrophic lateral sclerosis) is a disease that destroys nerve cells that control skeletal muscle activity. Without neural stimulation, skeletal muscles eventually waste away and mobility is impossible. In other words, skeletal muscles __________.
The deltoid muscle fibers are separated into __________.
