Ch. 6 Muscle Test Review

striated involuntary muscle tissue is classified as ______ muscle.

• skeletal

• either smooth or skeletal

• cardiac

• smooth

which term does not describe smooth muscle cells?

• skeletal

• visceral

• nonstriated

• involuntary

what organelle wraps and surrounds the myofibril and stores calcium?

• sarcoplasmic reticulum

• cross bridge

• sarcomere

• sarcolemma

musscle tissue has the ability to shorten when adequately stimulated, a characteristic known as ________.

• elasticity

• contractility

• irritability

• extensibility

one neuron and all skeletal muscles it stimulates is known as a _______.

• neuromuscular junction

• motor unit

• synaptic cleft

• sarcoplasmic reticulum

the heads of the myosin myofilaments are called________ when they link the thick and thin filaments together during skeletal muscle contraction.

• cross bridges

• synapses

• neuromuscular junctions

• motor units

what is the unstoppable electric currents that travels down the length of the entire surface of a sarcolemma?

• acetylcholine

• neuromuscular junction

• neurotransmitter

• action potential

according to the sliding filament theory, how does muscle contraction occur?

• a bands bunch up and shorten as myosin heads attach to thin filaments

• Myosis heads form cross bridges and pull thin filaments causing them to slide.

• myosin heads attach and detach from thin filaments, causing thin filaments to shorten

• both thicka nd thin filaments short as the muscle contracts.

anaerobic glycolosis requires ______ to make ATP.

• oxygen only

• creatine phosphate only

• glucose only

• both oxygen and glucose

Tags

NGSS.HS-LS2-3

a smooth, sustained contraction with no ecidence of relaxation is called?

• unfused, or incomplete, tetenus

• a twitch

• fused, complete, tetanus

• summing of contractions