Describe all factors that result in rigor mortis that occurs after the death of an individual....

Describe all factors that result in rigor mortis that occurs after the death of an individual.

Please provide short answers to the following questions:

How is a skeletal muscle fiber categorized as either fast or slow?

Which skeletal muscle fibers have many capillaries and many mitochondria? Why?

What color are oxidative fibers? Justify why.

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

Coal miners who spend years inhaling fine coal dust have much of their alveolar surface covered with scar-like tissue. How would this condition affect exchange of gases between alveoli and capillaries? Explain in details.

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

What effect does local acidosis have on the delivery of oxygen to the working tissues?
What is this effect called?
Why is it important in this situation?

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Expert Solution

Sydney Mullin answered 9 months ago

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