Chapter 4 The Muscular System A&P Flashcards
are the long, slender cells that make up muscles
muscle fibers
is a band of connective tissue that envelops, separates, or binds together muscle or groups of muscles
fascia
means pertaining to muscle tissue and fascia
myofascial
is a narrow band of nonelastic, dense, fibrous connective tissue that attaches a muscle to a bone
tendon
is a sheet-like fibrous connective tissue, which resembles a flattened tendon that serves as a fascia to bind muscles together or as a means of connecting muscle to bone
aponeurosis
are attached to the bones of the skeleton and make body motions possible
skeletal muscle
are located in the walls of internal organs such as the digestive tract, blood vessels, and ducts leading from glands
smooth muscle
also known as myocardium, form the muscular walls of the heart
myocardial (cardiac) muscle
what are the characteristics of skeletal muscle
voluntary, striated, and multiple eccentric nuclei
what are the characteristics of smooth muscle
involuntary, non-striated
what are the characteristics of cardiac muscle
involuntary, striated, and one centrally located nucleus
is the stimulation of a muscle by an impulse transmitted by a motor nerve
muscle innervation
means pertaining to the relationship between a nerve and muscle
neuromuscular
refers to working in opposition to each other
antagonistic
is the tightening of a muscle
contraction
occurs when a muscle returns to its original form
relaxation
is the movement of a limb away from the midline
abduction
is the movement of a limb toward the midline
adduction
is the act of raising or lifting a body part
elevation
is the act of lowering a body part
depression
is a circular movement around an axis such as the shoulder joint
rotation
is the circular movement at the far end of a limb
circumduction
means decreasing the angle between two bones by bending a limb at a joint
flexion
means increasing the angle between two bones or the straightening out of a limb
extension
is the extreme or overextension of a limb or body party
hyperextension
turns a body part on its axis
rotator muscle
is the group of muscles and their tendons that hold the head of the humerus securely in place as it rotates within the shoulder
rotator cuff
is the act of rotating the arm or the leg so that the palm of the hand or sole of the foot is turned forward or upward
supination
is the act of rotating the arm or leg so that the palm of the hand or sole of the foot is turned downward or backward
pronation
is the movement that bends the foot upward at the ankle
dorsiflexion
is the movement that bends the foot downward at the ankle
plantar flexion
means pertaining to the sole of the foot
plantar
is where the muscle begins; located nearest the midline of the body or on a less movable part of the skeleton
origin