Exam 8: Muscle Physiology

Which of the following is most closely associated with a skeletal muscle fiber's latent period?

Thin and thick filaments overlap in the A band.

Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below: a.actin only b.myosin only c.actin and myosin d.troponin-tropomyosin complex e.actin, troponin, and tropomyosin f.actin, myosin, troponin, and tropomyosin -Contractile protein(s)

Which of the following changes in banding pattern occur during muscle relaxation?

The ____________________ stores calcium ions inside muscle cells.

Dihydropyridine receptors are most closely associated with

Skeletal muscle cells contain intracellular contractile proteins, including troponin and tropomyosin.

The origin of a muscle is its

With eccentric muscle contractions,

Myosin is

Indicate which characteristic applies to the specific type of muscle contraction: a.isometric b.isotonic c.eccentric d.concentric e.isometric and eccentric f.isotonic and concentric g.isotonic, eccentric, and concentric -Does not accomplish any work

The metabolic capability of a muscle fiber can affect the degree of tension it can develop.

Fast-glycolytic muscle fibers do not require as much oxygen use as slow-oxidative fibers.

The T tubule is lined with the muscle cell's membrane.

Asynchronous recruitment gives motors units that have been active an opportunity to rest while others are firing.

An exercising muscle's inability to respond to stimulation due to a buildup of inorganic phosphate or a depletion of glycogen is called _______, whereas, it is called ______ (two words) if it results from a lack of muscle stimulation by the nervous system.

The two types of fast twitch fibers are interconvertible depending on the type of conditioning they receive.

In a muscle fiber undergoing maximal tetanic stimulation, the velocity of shortening ____ as the load ____.

____________________ is the pigment that can store small amounts of oxygen in the skeletal muscle.

Muscles developing tension while lengthening are performing ____ contractions.