Joint Classification
________ are freely movable joints.
Diarthroses
Ball-and-socket joints produce ________ movement.
Multiaxial
The connective tissue sheath that covers each individual muscle fiber is the ________.
Endomysium
The neurotransmitter that motor neurons use to "tell" skeletal muscle to contract is ________.
Acetylcholine (ACh)
________ is the most powerful muscle in the body.
Quadriceps femoris
Fibrous, cartilaginous, and synovial are the ________ classifications of joints.
Structural
The ______ secretes synovial fluid.
Synovial membrane
________ accounts for the bulk (up to 80%) of muscle fiber volume.
Myofibrils
In the sliding filament model of muscle contraction, the myofilaments slide over each other, resulting in the overlapping of actin and __________.
myosin
Flexing the forearm with the biceps brachii utilizes a ________ class lever.
Third
________ are joints held together exclusively by ligaments.
Syndesmoses
______ describes the movement of pointing your toes downward.
Plantar flexion
Thick filaments are found in the ________ of the sarcomere.
A band
________ must bind to myosin heads in order for the heads to detach from the actin filaments.
ATP
The ________ flattens during inspiration.
Diaphragm
The articulation of a tooth with its bony alveolar socket is an example of a ________.
Gomphosis
A ________ is an elongated fluid-filled sac that wraps around a tendon to decrease friction.
Tendon sheath
In a resting muscle cell, the myosin binding sites are blocked by ________.
Tropomyosin
Calcium is released from the terminal cisternae in response to ______.
An action potential
The ________ is used to suck in/compress the cheeks.
Buccinator
When someone has "slipped a disc" of their vertebral column, which type of joint have they disrupted?
Symphyses
The knee joint is most susceptible to injury when _____ blows are applied to the knee.
Lateral
T tubules are inward invaginations of the ___________.
Calcium reenter the terminal cisternae after muscle contraction is finished by ______.
Active transport
The ________ extends the toes.
Extensor digitorum longus