Assuming you are a teaching assistant in BIOL 430 in the near future. Help a student in your “office hours” by describing the role of each of the following in muscle function – actin, myosin, troponin, and tropomyosin:

Scientists have identified at least 10 different myosin heavy chain (MYH) gene versions (or isoforms) in mammals from striated, smooth, and non-muscle cells. Match the fiber type with the primary myosin heavy chain gene/protein version: Type I Fiber Type IIa Fiber Type IIx Fiber

Describe the many expected training adaptations in the muscles targeted by a 6-month endurance/aerobic training program (e.g., cycling, running, swimming):

When you lift a barbell and generate enough force to shorten the biceps and lift the barbell then this is which type of contraction?  When you generate enough force to keep the barbell in a static position and not moving at all then this is which type of contraction? When you generate enough force in the biceps to slowly lower the barbell so that the muscle is actually lengthening then this is which type of contraction?

Describe (if you only list then no credit) the three mechanisms of ATP production in a skeletal myocyte that needs more ATP for muscle contraction:

Using the drop down boxes, number the following items (1-6) with #1 as the largest size to #6 as the smallest size: Fiber Actin/Myosin Trapezius Myofibril Fascicle Sarcomere

Describe three different ways ATP is used/utilized/spent by skeletal myocytes for contraction/relaxation:

While running a marathon (okay maybe more realistically, a 10-K), what source will supply the majority of ATP needed during the running muscle contractions?

The function of the T-tubules or Transverse Tubules in a skeletal myocyte is to:

Assuming you are a teaching assistant in BIOL 430 in the near future. Help a student in your “office hours” by describing the role of each of the following in muscle function – actin, myosin, troponin, and tropomyosin: