Exam 9: Muscles and Muscle Tissue

The 100-meter dash is a quick and short run requiring explosive speed. On completion of the dash, the runners will continue to breathe hard for several seconds to minutes even though they are no longer running. Which of the following is the best explanation for why this is so?

Reduction in blood flow to a muscle fiber would have the greatest effect on__________ .

Which of the following is the correct sequence of events for muscle contractions?

The ability of muscle to shorten forcibly when adequately stimulated is known as __________, and sets muscle apart from other tissue types.

Hypothetically, if a muscle were stretched to the point where thick and thin filaments no longer overlapped__________, .

Curare is a poisonous plant extract. Curare molecules have a chemical structure like the neurotransmitter ACh. Curare can bind to the ACh receptor site on the chemically gated ion channels in the motor end plate. Even Though curare will bind to the receptor site it will not open the ion channel and no ions will pass through. What do you think the symptoms of curare poisoning would look like?

Rigor mortis occurs because_________ .

The sliding filament model of contraction involves__________ .

Most skeletal muscles contain__________ .

Addition of more mitochondria to a muscle fiber will have the greatest effect on ___________ .

After much delayed removal of an elbow cast, Lauren noticed her arm was immovable. What happened to her arm?

During development embryonic cells will fuse to form muscle fibers. This will result in__________ .

Describe the anatomical parts of the muscle triad and how the function of these organelles work together to initiate contraction.

During muscle contraction, myosin cross bridges attach to which active sites?

What is the role of tropomyosin in skeletal muscles?

Approximately 80% of a muscle fiber's volume are the myofibrils. This characteristic reflects muscles ability to__________ .

What ultimately stops muscle stimulation when the motor neuron ceases firing?

If given the exact same amount of ATP, which of the three fiber types would be able to contract for the longest amount of time?

Myoglobin _________.

Although all the anatomical parts of muscle work together to give it its characteristics, which of the following proteins listed below would be most associated with the characteristics of extensibility?