Exam 46: Muscles, Skeletons, and Body Movements

What is the main role of myoglobin in muscle fibres?

In a skeletal muscle contraction, what must be moved to the grooves in the actin double helix to uncover the crossbridge binding site?

What is the name of the bundles of elongated, cylindrical cells that make up skeletal muscles?

How is the body of humans and most vertebrates supported?

Match each bone type with a skeleton type. Each skeleton type may be used once, more than once, or not at all. -cranial bones

Which term refers to a muscle that has the opposite effect to that of another muscle at the same joint?

Which muscle type is found in the walls of body tubes and the cavities of vertebrates, such as blood vessels and the intestines?

What is a motor unit?

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all. -slow contraction speed

In which ion would a defect in transport have the most direct effect on muscle contraction?

What action causes the shape change in the myosin crossbridge that directly triggers the power stroke in skeletal muscle contraction?