What forms of energy reserves do resting skeletal muscle fibers contain?

Describe the events that occur from the time calcium ions enter the axon terminal at the neuromuscular junction until muscle cell contraction occurs.

Multiple ChoiceMore than one choice may apply.After ACh attaches to its receptors at the neuromuscular junction, what is the next step?a. Sodium channels open.b. Calcium binds to regulatory proteins on the thin filaments.c. Cross bridges attach.d. ATP is hydrolyzed.

Chemical A binds and blocks acetylcholine receptors of muscle cells. Chemical B floods the cytoplasm of muscle cells with calcium ions. Which chemical would make the best muscle relaxant, and why?

What structural feature of a skeletal muscle fiber propagates action potentials into the interior of the cell?

Areas of the body where you would not expect to find slow fibers include the (a) back and calf muscles, (b) eye and hand, (c) chest and abdomen, (d) all of these.

For each portion of a myogram tracing a twitch in a stimulated calf muscle fiber, describe the events that occur within the muscle fiber.

Characteristics of isometric contractions include all buta. shortening,b. increased muscle tension throughout the contraction phase,c. absence of shortening,d. used in resistance training.

When a suicide victim was found, the coroner was unable to remove the drug vial clutched in his hand. Explain the reasons for this. If the victim had been discovered three days later, would the coroner have had the same difficulty? Explain.