Chapter 4- The Musclar System Flashcards
Generates nearly 85% of the heat that keeps the body warm
Muscle movement
Hold the body erect and make movement possible
Body
Move food through the digestive system
Muscles
Movement such as walking, aid the flow of blood through veins as it returns to the heart
Muscle
Action moves fluids through the ducts and tubes associated with other body systems
Muscle
The _________ has more than 600 muscles, which make up about 40-45% of the body’s weight.
Body
____________ _____________ are made up of fibers that are covered with fascia and are attached to bones by tendons
Skeletal muscles
____________ __________ are the long, slender cells that make up muscles. Each muscle consists of a group of fibers that are bound together by connective tissue.
Muscle fibers
Band of connective tissue that envelopes, separates, or binds together muscles or groups of muscles.
Fascia
Flexible to allow muscle movement. (Thin film on chicken)
Fascia
Pertaining to muscle tissue and fascia.
Myofascial
Muscle
my/o
Fascia
fasci
Pertaining to
-al
Is a narrow band of nonelastic, dense, fibrous connective tissue that attaches a muscle to a bone. (Do NOT confuse _________ with ligaments, which are bands of fibrous tissue that form by connecting one bone to another bone)
Tendon
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
Attached to the bones of the skeleton and make body motions possible
Skeletal muscles
Skeletal muscles are also known as ________ _________, because we have conscious (voluntary) control over these muscles
Voluntary muscles
Skeletal muscles are also known as ___________ ____________ because under a microscope, the dark and light bands in the muscle fibers create a striped appearance.
Striated muscles
Striped
Striated
Located in the walls of internal organs such as the digestive tract, blood vessels, and ducts leading from glands.
Smooth muscles
Smooth muscles are also known as ____________ _____________ because they are under the control of the autonomic nervous system and are not under voluntary control.
Involuntary muscles
Smooth muscles are also known as ___________ ____________. This is because they do not have the dark and light bands that produce the striped appearance seen in striated muscles.
Unstriated muscles
Smooth muscles are also known as ____________ _____________ because they are found in hollow structures such as those of the digestive and urinary systems. These muscles are found in large internal organs, with the exception of the heart.
Visceral muscles
Relating to the internal organs
Visceral
(Combo muscles) also known as myocardium or cardiac muscle, form the muscular walls of the heart.
Myocardial muscles
Heart
cardi
_____________ ____________ is like striated skeletal muscle in appearance but is similar to smooth muscle in that it’s action is involuntary.
Myocardial muscle
Stimulation of a muscle by an impulse transmitted by a motor nerve. Motor nerves enable the brain to stimulate a muscle or contract. When the stimulation stops, the muscle relaxes. This information controls the body’s voluntary muscular contractions. If the nerve impulse is disrupted due to an injury or disease, the muscle is unable to function properly.
Muscle innervstion
Pertaining to the relationship between a nerve and muscle
Neuromuscular
Nerve
neur/o
Muscle
muscu
Pertaining to
-ar
All muscles are arranged in ___________ ___________.
Antagonistic pairs
Refers to working in opposition to each other.
Antagonistic
Tightening of a muscle
Contraction
Occurs when a muscle returns to its original form
Relaxation
(Jumping jacks), is the movement of a limb (arm or leg) away from the midline of the body.
Abduction
Lead
duct
Away from
ab-
Action
-ion
Muscle that moves a body part away from the midline.
Abductor
Movement of a limb (arm or leg) toward the midline of the body.
Adduction
Toward
ad-
Muscle that moves a body part toward the midline.
Adductor
Decreasing the angle between two bones by bending a limb at a joint.
Flexion
Bend
flex
Bends a limb at a joint
Flexor muscle
Increasing the angle between two bones or the straightening out of a limb
Extension
Away from
-ex
Stretch out
tens
Straightens a limb at a joint
Extensor muscle
Is the extreme or overextension of a limb or body part beyond its normal limit. (Whip lash)
Hyperextension
Is the act of raising or lifting a body part. (Elevator)
Elevation
Muscles of the face raises the corners of the mouth into smile.
Levator anguli oris
Muscle that raises a body part.
Levator
The act of lowering a body part.
Depression
Lowers the corner or the mouth into a frown.
Depressor anguli oris
Muscle that lowers a body part
Depressor
Circular movement around an axis such as the shoulder joint.
Rotation
An imaginary line that runs lengthwise through the center of the body, and rotation turns a bone on its own ______.
Axis
The circular movement at the far end of a limb. (Swinging motion of the far end of the arm, softball pitch)
Circumduction
Turns a body part on its axis
Rotator muscle
The head of the __________, which is the bone of the upper arm, rotates within the shoulder joint.
Humerus
Group of muscles and their tendons that hold the head of the humerus securely in place as it rotates within the shoulder joint.
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.
Dorsiflextion
Is the moment that bends the foot downward at the ankle.
Plantar Flexion
Pertaining to the sole of the foot
Plantar
Where the muscle begins, and it is located nearest the midline of the body or on a less movable part of the skeleton.
Origin
Is where the muscle ends by attaching to a bone or tendon. In contrast to the origin, the insertion is the more moveable attachment, and it is the farthest point from the midline of the body.
Insertion
Helps bend the neck and rotate the head
Sternocleidomastoid muscle
Breastbone
stern/o
Collar bone
cleid/o
Muscle inserts at one point of insertion into the mastoid process.
Mastoid
___________ muscles and ____________ muscles are the pair of muscles that make flexion (bending) and extension (straightening) of the wrist possible.
Flexor carpi muscles and extensor carpi muscles
Wrist or wrist bones
Carpi
A thick, fan-shaped muscle situated on the anterior chest wall
Pectoralis major
Relating to the chest
Pectoral
Towards the side
Lateralis
Toward the midline
Medialis
Slanted or at an angle
Oblique
In straight alignment with the vertical axis of the body
Rectus
Ring-like muscle that tightly constricts the opening of a passageway
Sphincter
Crosswise direction
Transverse
Also known as biceps, formed from two divisions
Biceps brachii
Also known as triceps, is formed from three divisions
Triceps brachii
Two
bi-
Head
-ceps
Three
tri-
The largest muscle of the buttock
Gluteus Maximus
Located on the shoulder, is shaped like an inverted triangle, which is the Greek letter delta
Deltoid muscle
Located on the back of the upper leg, consists of three separate muscles: biceps femoris, semitendinosus, and semimembranous muscles. Primary functions: knee flexion and hip extension
Hamstring group