Muscle Origin and Insertion
The term for the point where a muscle attaches to a stationary bone.
The origin
What type of muscle is responsible for voluntary movement?
Skeletal muscle
What does the term "biceps" refer to?
A muscle with two heads
What type of contraction occurs when a muscle shortens?
Concentric contraction
What is the antagonist muscle if the bicep is the agonist.
Tricep
Where does the Hamstring group insert
The knee or the tibia and fibula
Which muscle type is found in the walls of the heart?
Cardiac muscle
How is the muscle "pectoralis" named
It refers to its location in the chest (pectoral region)
Define isometric contraction
A contraction where the muscle length remains the same while tension increases
What is the antagonist muscle if the latissimus dorsi is the agonist
Deltoid
What muscle originates from the scapula and inserts on the humerus?
The deltoid
Name the muscle type that is involuntary and found in organs
Smooth muscle
What does "deltoid" mean in reference to its shape
Triangular shape
What is an example of an eccentric contraction?
Lowering a weight slowly
What role do antagonists play during muscle movement?
To control the movement and maintain balance.
The bone which the bicep originates from
Humerus
Which type of muscle is striated and multinucleated?
Skeletal muscle
What does the prefix "rectus" indicate about a muscle's fibers
They run straight (parallel to the midline)
Describe what happens during a concentric contraction
The muscle shortens while generating force
Name the agonist and antagonist during a leg extension.
Agonist: Quadriceps Antagonist: Hamstrings.
Origin: Clavicle and sternum
Insertion: Humerus
Name one difference between skeletal and smooth muscles
Skeletal muscle is voluntary; smooth muscle is involuntary
Explain how the muscle "sternocleidomastoid" gets its name
It originates from the sternum and clavicle and inserts on the mastoid process of the skull
How do muscle contractions help in maintaining posture
They stabilize joints and keep the body upright.
Explain how agonist and antagonist muscles work together during a squat
The quadriceps act as the agonist while the hamstrings act as the antagonist to control the movement