Structure of Skeletal Muscle
Skeletal Muscle Contraction
Smooth and Cardiac Muscle
Skeletal Muscle Actions
Major Skeletal Muscles
100
I bands, Z lines, A bands, H zone, and M line.
What are the parts that make up the striation pattern of skeletal muscle fibers?
100
The source of energy for skeletal muscle contraction for a short time
What is ATP?
100
Smooth, Cardiac, and Skeletal
What are the three types of muscle in the muscular system?
100
This action involves a muscle decreasing the angle between two body parts, such as when you bend your elbow.
What is flexion?
100
This muscle group extends the knee.
What are the quadriceps?
200
An organ of the muscular system made of skeletal muscle tissue, nervous tissue, blood, and other connective tissue.
What is skeletal muscle?
200
When exercising extensively lactate develops in the muscle fiber, this is the amount of oxygen that liver cells need to convert the lactate into glucose.
What is oxygen debt?
200
Both smooth and cardiac muscle move due to impulses not from choice.
What is involuntary movement?
200
When the forearm rotates so the palm faces upward, this action is referred to as this.
What is supination?
200
The main muscle stimulated when performing skullcrushers.
What are tricep brachii?
300
These threadlike parts in the sarcoplasm contain protein filaments such as myosin and actin and have a major role in muscle contraction.
What are myofibrils?
300
This is the term for the process in which the muscle fiber contracts after receiving an action potential, leading to the sliding of actin and myosin filaments.
What is sliding filament theory?
300
This protein, found in smooth muscle, forms cross-bridges with actin to produce force during contraction, similar to myosin in skeletal muscle.
What is myosin?
300
This term describes the muscle action that occurs when the body moves in a circular motion, such as when you rotate your shoulder.
What is circumduction?
300
This muscle, located in the upper back and neck, is responsible for moving the shoulder blades and extending the neck.
What is the trapezius?
400
This connective tissue layer surrounds each individual muscle fiber and plays a role in transmitting force during contraction.
What is the endomysium?
400
This occurs when a muscle is exercised strenuously for a prolonged period of time and there is an increased lactic acid production from anaerobic respiration and if pH drops sufficiently,muscle fibers may no longer respond to stimulation.
What is muscle fatigue?
400
Unlike skeletal muscle fibers, smooth muscle cells have this shape, which helps them contract in a more continuous, sustained manner.
What is a splindle shape?
400
This term refers to the process of a muscle working in opposition to the primary mover, helping control or slow down a movement.
What is an antagonistic action?
400
This muscle is responsible for flexing the wrist and fingers and is one of the primary muscles used when gripping objects.
What is the flexor digitorum superficialis?
500
This specialized organelle within muscle fibers stores calcium ions, which are crucial for muscle contraction and relaxation. This organelle is also a network of membranous channels that surround each myofibril and run parallel to it.
What is a sarcoplasmic reticulum?
500
This ion is crucial for the release of acetylcholine from the synaptic vesicles at the neuromuscular junction and for the propagation of the action potential in both the motor neuron and the muscle fiber.
What is calcium?
500
These specialized structures, located at the junctions between cardiac muscle cells, allow for rapid transmission of action potentials, coordinating contraction.
What are intercalated discs?
500
What is isotonic eccentric contraction?
500
Sternocleidomastiod