Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back into the sarcoplasmic recticulum,the myosin is released from its binding site ,and the muscle fiber returns to its resting lenght true or false

Which of the following would NOT occur as a result of regular exercise to a specific muscle group (assume you are resting now, but have been working this muscle group)? more capillaries will grow into the area the muscle cells will build more mitochondria O the muscle cells will build fewer contractile proteins O the muscle cells will increase their glycogen stores

As an action potential moves along the sarcolemma, the brief opening of voltage-gated Na+ channels will allow Na+ to rush into the muscle cell, causing the inside of the membrane at that location to become more ________.      positive     negative

Draw a graph of the isometric force–length relationshipof striated muscle, indicating where maximal overlap betweenactin and myosin filaments occurs.

Distinguish between skeletal, smooth, and cardiac muscle in terms of location and whether they have sarcomeres. Use the sliding filament model to draw how thin filaments, thick filaments, and Z lines move during muscle contraction. Predict how perturbations of acetylcholine release, reception, or breakdown will influence muscle contraction. Predict how perturbations of actin, troponin, tropomyosin, myosin, or calcium would influence muscle contraction. Distinguish between the sympathetic and parasympathetic nervous system. Predict how changes in stress levels or situations would affect activation of the sympathetic and parasympathetic nervous system, levels of epinephrine and norepinephrine, and blood pressure.

After the power-stroke, the myosin heads must bind ______ in order to release actin. The muscles become very stiff (known as rigor mortis) after death because the cells run out of _____. "   A calcium; calcium   B troponin; troponin   C tropomyosin; tropomyosin   D sodium; sodium   E ATP; ATP

During muscle contraction, the ion that leaks out of the sarcoplasmic reticulum and induces myofibrils to contract is O Na+. O Mg2+. O Cksup>-. O K+. O Ca2+.

Put in order the steps of activation, excitation and contraction of skeletal muscle.

What type of action potential conduction is found on the surface of skeletal muscle cell? continuous conduction  saltatory conduction  the most common cause of muscle cramps is low potassium. True :/ false

Why does continuous calcium release within a muscle fiber cause greater tension? OActivates more calcium pumps O Activates myofibrils continuously Increases action potential frequency Lengthens sarcomere O Calcium makes the muscle fiber an offer it can't refuse