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1. Describe all factors that result in rigor mortis that occursafter the death of an individual.

1. Please provide short answers to the following questions:

1. How is a skeletal muscle fiber categorized as either fast orslow?

1. Which skeletal muscle fibers have many capillaries and manymitochondria? Why?

1. What color are oxidative fibers? Justify why.

1. Suzane was riding her bicycle on a busy street when a car madea sudden right turn out of the left lane of traffic directly infront of her. Though she hit her brakes as hard as she could, sheended up crashing into the rear door of the vehicle at a highspeed. Immediately after hitting the ground she felt a sudden,sharp pain in the left side of her thorax and experienced suddendyspnea (shortness of breath, difficulty breathing). Given hersymptoms, what has likely happened to Suzane? Explain as completelyas possible the mechanisms behind her injury and symptoms.

1. Coal miners who spend years inhaling fine coal dust have muchof their alveolar surface covered with scar-liketissue. How would this condition affect exchange of gasesbetween alveoli and capillaries? Explain in details.

1. A track sprinter has just completed a 200-m sprint. His legsare “burning” as lactic acid builds up within his muscle cells.This lactic acid is produced as his muscle cells increase the rateof glycolysis and fermentation to provide the necessary ATP topower the quick muscular contractions necessary during sprinting.The production of excess lactic acid in skeletal muscle cells leadsto local acidosis (i.e. decreased pH) of the tissues.

1. What effect does local acidosis have on the delivery of oxygento the working tissues?
2. What is this effect called?
3. Why is it important in this situation?