Muscle Tissue Flashcards
Specialized proteins for movement…
Actin and myosin, which make up myofilaments
Muscle plasma membrane…
Sarcolemma
Cytoplasm of muscle cells…
Sarcoplasm
Voluntary control of this type of muscle…
Skeletal Muscles
Visceral Muscles are…
Internal Organs
Functional characteristics of muscle tissue…
Excitability, contractility, extensibility, elasticity
Three types of muscle tissue…
Skeletal, cardiac, smooth
Three types of connective tissue wrappings…
Epimysium, perimysium and endomysium
Bundle of muscle fibers within a muscle…
Fascicle
Connective tissue wrapping around a muscle (organ)…
Epimysium
Connective tissue wrapping around a fascicle…
Perimysium
Connective tissue wrapping around a muscle fiber…
Endomysium
Complex organelle composed of bundles of myofilaments…
Myofibrils
End of a muscle attached to the immovable bone, responsible for stability…
Origin
End of a muscle attached to the movable bone, responsible for movement…
Insertion
Transient depolarization event…
Action potential
Neurons that stimulate muscles to contract…
Motor neurons
Nervous system that deals with voluntary control…
Somatic nervous system (SNS)
Where a motor neuron meets a muscle fiber…
Neuromuscular junction
Ions that stimulate action potential…
Sodium (Na+) and potassium (K+)
Acetylcholinesterase is…
Enzyme that degrades ACh to close receptor gate
Repolarization occurs (direction; period)…
In the same direction as depolarization; during refractory period
Type of contraction without movement…
Isometric contraction
Type of contraction with movement…
Isotonic contraction
Process that occurs during latent period of a muscle twitch…
Excitation-contraction coupling
Contractile movement of smooth muscles…
Peristalsis
When the longitudinal layer of smooth muscle contracts…
The organ dilates and contracts
When the circular layer of smooth muscle contracts…
The organ elongates
Alternating contractions and relaxations of smooth muscles that mix and squeeze substances through lumen of hollow organs…
Peristalsis
Outer layer of smooth muscle…
Longitudinal layer
Inner layer of smooth muscle…
Circular layer
Factors in the force of muscle contraction…
Number of muscle fibers contracting, relative size of the muscle, degree of muscle stretch
After ATP are hydrolyzed, they are regenerated by…
Interaction of ADP with creatine phosphate, anaerobic glycolysis or aerobic respiration
Structure found within the I-band, between sarcomeres…
Z-disc
Zone found within the A-band of a sarcomere…
H-zone
If a muscle attaches directly…
The epimysium of the muscle is fused to the periosteum of a bone
If a muscle attaches indirectly…
Connective tissue wrappings extend beyond the muscle as a tendon or aponeurosis
