Chapter 10 Flashcards
calcium of binding protein attached to the thin filaments?
troponin
what is the effect of pumping calcium into the sarcoplasmic reticulum
decreasing tension from muscle contraction
postural muscles which contain constant tension without changing length are undergoing
isometric contraction
name one thing that is accurate about smooth muscle
it can contract in response to hormone signaling
the fastest rate of nervous stimulation produces which effect?
tetanus
in one cycle of excitation-contraction coupling, which event, required for muscle contraction, must precede the unblocking of myosin binding sites on thin filaments?
conformational change in troponin
muscle fibers for endurance activity appear what color? due to?
appear red due to myoglobin
what is the role of transverse tubules in a skeletal muscle cell
propagate AP deep within sarcoplasm
what is the role of transverse tubules in a skeletal muscle cell
propagate AP deep within sarcoplasm
type of muscles contract using mechanism known as the sliding filament mechanism?
smooth, cardiac, skeletal muscles
characteristic of muscles?
responsiveness or excitability (chemical or stretch)
conductivity (AP along the membrane )
contractility (in length and strength)
extensibility ( muscle cells can stretch without being damaged and allows contraction when cell is extended)
elasticity (ability to recoil after being stretched)
what are the contractile proteins?
myosin and actin
epimysium
surrounds the entire muscle
perimysium
surrounds bundles of muscle fibres (muscle cells)
fascicles
term for bundles of muscle fibres
