Muscle structure
This muscle type is voluntary, striated, and attached to bones.
What is Skeletal muscle
This type of contraction occurs when the muscle neither shortens nor lengthens, but tension increases (e.g., holding a heavy weight steady).
What is isometric contraction?
This term describes the attachment point of a muscle that does not move during contraction and is typically more proximal.
What is the origin?
This is the specialized synapse where a motor neuron communicates with a muscle fiber to trigger a muscle contraction.
What is a Neuromuscular junction?
The energy source used directly for muscle contraction is abbreviated as this.
What is ATP?
Excitability, Contractility, Extensibility, Elasticity are these.
What are 4 common properties of muscle tissue?
What is the connective tissue that surrounds and envelops a whole muscle?
What is the Epimysium
Increasing the strength of a muscle contraction by activating more motor units is called this process.
What is recruitment?
This term describes the muscle that is the prime mover for a specific action.
What is an Agonist?
This enzyme breaks down the neurotransmitter, ACh, in order to deactivate ACh receptor sites and end propagation of the action potential.
What is Acetylcholinesterase?
During contraction, the myosin heads bind to active sites on these thin filaments.
What is actin?
Tendons and these white fibrous tissues that occur in flat muscles having a wide area of attachment to bone.
What is an Aponeurosis?
These dark-staining structures, found only in cardiac muscle tissue, allow the cells to contract as a coordinated unit.
This high-energy compound found in muscle is used to quickly replenish ATP supplies during intense, short bursts of activity like diving.
What is creatine phosphate?
During this type of contraction muscle tension remains constant while the muscle shortens.
What is a Concentric contraction (Isotonic concentric)
This ion diffuses rapidly into the sarcoplasm when ACh binds to receptors in the synaptic end bulb.
Na-
This fibrous protein winds around the thin filament and, in a resting muscle, covers the myosin-binding sites.
What is Tropomyosin?
Perimysium divides muscle into many compartments that contain bundles of muscle fibers called this.
What are fascicles?
The repeating functional unit of a skeletal muscle fiber, located between two Z-lines, is known as this structure.
What is a sarcomere?
This is the brief 'waiting' period that corresponds to the time for conduction of an action potential and release of Ca at Sarcoplasmic reticulum.
What is the Latent period?
This occurs when repeated action potentials stimulate muscle fibers before the muscle relaxes, resulting in increased tension with each stimulus.
What is Wave summation?
This space exists between the end of the axon and the sarcolemma of the muscle fiber.
What is the Synaptic cleft?
Myosin heads bind to active sites on actin forming these?
What are cross-bridges?
Supporting soft tissues, Guarding body entrances & exits, Maintaining body temperature, & Storing nutrients are examples of these.
What are Skeletal muscle functions?
These cells, which are typically inactive, are responsible for the regeneration of skeletal muscle tissue after injury.
What are satellite cells?
This type of muscle fiber uses aerobic metabolism, produces low-power contractions, and is slow to fatigue.
What is a slow twitch or slow oxidative fiber?
These muscles that assist the prime mover, often by adding force, stabilizing joints, or preventing unwanted movements.
These are the 3 major components of the Neuromuscular junction.
What are the synaptic end bulb, synaptic cleft, and motor end plate?
Once the power stroke occurs, these two molecules are released from the myosin heads.
What are ADP and inorganic phosphate?
These structures are made of 2 terminal cisternae + 1 T-tubule and rapidly transmit an action potential from the muscle fiber's surface deep into the cell.
What is a triad?