SPH-K 409: Final Exam Questions and All Correct Answers Updated.

SPH-K 409: Final Exam Questions
and All Correct Answers 2025-2026
Updated.
What are the contractile speeds of Type I, Type IIa, and Type IIx fibers? - Answer Type I- 110
ms (slowest)



Type IIa- 50 ms



Type IIx- 50 ms



What skeletal muscle fiber type has the weakest motor unit force? - Answer -Type I



What skeletal muscle fiber type has the strongest motor unit force? - Answer -Type IIx



What skeletal muscle fiber has the smallest motor neuron size? - Answer Type I



What skeletal muscle fiber has the largest motor neuron size? - Answer Type IIx



What skeletal muscle fiber has the slowest nerve conduction velocity? - Answer Type I



What skeletal muscle fiber has the fastest nerve conduction velocity? - Answer Type IIx



What skeletal muscle fiber has the slowest myosin ATPase? - Answer Type I



What skeletal muscle fiber has the fastest myosin ATPase? - Answer Type IIx



What skeletal muscle fiber has the least developed SR? - Answer Type I



What skeletal muscle fiber has the most developed SR? - Answer Type II



What are the oxidative capacities for Type I, Type IIa, and Type IIx fibers? - Answer Type I-
high



Type IIa- moderate

, Type IIx-low



What are the myoglobin contents for Type I, Type IIa, and Type IIx fibers? - Answer Type I-
high



Type IIa- high/moderate



Type IIx- low



What are the mitochondrial densities for Type I, Type IIa, and Type IIx fibers? - Answer Type
I- high



Type IIa- high/moderate



Type IIx- low



What are the capillarizations for Type I, Type IIa, and Type IIx fibers? - Answer Type I- high



Type IIa- high



Type IIx- low



What are the glycogen stores for Type I, Type IIa, and Type IIx? - Answer Type I- low



Type IIa- high/moderate



Type IIx- high



What are the glycolytic capacities for Type I, Type IIa, and Type IIx? - Answer Type I- low



Type IIa- high



Type IIx- high