Chapter 4- The Musclar System Flashcards
Generates nearly 85% of the heat that keeps the body warm
Hold the body erect and make movement possible
Move food through the digestive system
Movement such as walking, aid the flow of blood through veins as it returns to the heart
Action moves fluids through the ducts and tubes associated with other body systems
The _________ has more than 600 muscles, which make up about 40-45% of the body’s weight.
____________ _____________ are made up of fibers that are covered with fascia and are attached to bones by tendons
____________ __________ are the long, slender cells that make up muscles. Each muscle consists of a group of fibers that are bound together by connective tissue.
Band of connective tissue that envelopes, separates, or binds together muscles or groups of muscles.
Flexible to allow muscle movement. (Thin film on chicken)
Pertaining to muscle tissue and fascia.
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)
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.
Attached to the bones of the skeleton and make body motions possible
Skeletal muscles are also known as ________ _________, because we have conscious (voluntary) control over these muscles
Skeletal muscles are also known as ___________ ____________ because under a microscope, the dark and light bands in the muscle fibers create a striped appearance.
Located in the walls of internal organs such as the digestive tract, blood vessels, and ducts leading from glands.
Smooth muscles are also known as ____________ _____________ because they are under the control of the autonomic nervous system and are not under voluntary control.
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.
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.
Relating to the internal organs
(Combo muscles) also known as myocardium or cardiac muscle, form the muscular walls of the heart.
_____________ ____________ is like striated skeletal muscle in appearance but is similar to smooth muscle in that it’s action is involuntary.
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.
Pertaining to the relationship between a nerve and muscle
All muscles are arranged in ___________ ___________.
Refers to working in opposition to each other.
Tightening of a muscle
Occurs when a muscle returns to its original form
(Jumping jacks), is the movement of a limb (arm or leg) away from the midline of the body.
Muscle that moves a body part away from the midline.
Movement of a limb (arm or leg) toward the midline of the body.
Muscle that moves a body part toward the midline.
Decreasing the angle between two bones by bending a limb at a joint.
Bends a limb at a joint
Increasing the angle between two bones or the straightening out of a limb
Straightens a limb at a joint
Is the extreme or overextension of a limb or body part beyond its normal limit. (Whip lash)
Is the act of raising or lifting a body part. (Elevator)
Muscles of the face raises the corners of the mouth into smile.
Levator anguli oris
Muscle that raises a body part.
The act of lowering a body part.
Lowers the corner or the mouth into a frown.
Depressor anguli oris
Muscle that lowers a body part
Circular movement around an axis such as the shoulder joint.
An imaginary line that runs lengthwise through the center of the body, and rotation turns a bone on its own ______.
The circular movement at the far end of a limb. (Swinging motion of the far end of the arm, softball pitch)
Turns a body part on its axis
The head of the __________, which is the bone of the upper arm, rotates within the shoulder joint.
Group of muscles and their tendons that hold the head of the humerus securely in place as it rotates within the shoulder joint.
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.
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.
Is the movement that bends the foot upward at the ankle.
Is the moment that bends the foot downward at the ankle.
Pertaining to the sole of the foot
Where the muscle begins, and it is located nearest the midline of the body or on a less movable part of the skeleton.
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.
Helps bend the neck and rotate the head
Muscle inserts at one point of insertion into the mastoid process.
___________ 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
A thick, fan-shaped muscle situated on the anterior chest wall
Relating to the chest
Towards the side
Toward the midline
Slanted or at an angle
In straight alignment with the vertical axis of the body
Ring-like muscle that tightly constricts the opening of a passageway
Also known as biceps, formed from two divisions
Also known as triceps, is formed from three divisions
The largest muscle of the buttock
Located on the shoulder, is shaped like an inverted triangle, which is the Greek letter delta
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