Honors Anatomy Flashcards
___ is the study of muscle.
Myology
Striated appearance, Multiple nuclei, Voluntary control
Skeletal Muscle
Connect muscle to bone and transmit muscle forces.
Tendons
Connect bone to bone and provide joint stability.
Ligaments
Located in the I band (and part of the A band).
Thin Filaments
The filiment thats located in the A band.
Thick Filaments
Exists because it is the area in the A band where only thick filaments overlap, without thin filaments present.
H Zone
T-Tubules
Transmit electrical signals deep into muscle fiber for coordinated contraction.
Role of sarcoplasmic reticulum?
Store and release calcium ions to trigger muscle contraction.
What blocks myosin binding sites?
Tropomyosin prevents actin-myosin interaction in resting muscle state.
Define muscle fibers, myofibrils, myofilaments?
Cellular structures composed of protein filaments enabling muscle movement.
What are cross-bridges?
Myosin heads connecting to actin during muscle contraction process.
Whats the Muscle contraction trigger?
Calcium Ions
Main myofibril protein types?
Contractile, structural, and regulatory proteins enable muscle function.
What is synaptic cleft?
Gap between motor neuron and muscle fiber at junction.
whats the Neurotransmitter for muscle function.
Acetylcholine (ACh) generates action potential in muscle fiber.
Red versus white muscle fibers?
Red: endurance; white: power and quick, fatiguing movement.
What causes rigor mortis?
Calcium leakage and ATP depletion cause post-mortem muscle contraction.
Aerobic versus anaerobic respiration?
Aerobic uses oxygen, produces more ATP; anaerobic doesn’t.
Cause of lactic acid formation?
Low oxygen during intense exercise triggers anaerobic glucose metabolism.
what’s BONK, or, Hitting the wall
Cant produce enough ATP
