Exam 46: Muscles, Skeletons, and Body Movements

In a skeletal muscle contraction, which of the following acts to allow the crossbridge cycle to occur when it flows into the cytosol through open ion channels?

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

What is the name of the cylindrical contractile elements that are about 1 mm in diameter and which individual skeletal muscle cells are packed with?

Match each molecule with its description. -myosin

How many nuclei do skeletal muscle cells have, and what controls them?

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all. -intermediate glycogen content

How are the tube feet of sea stars, the erectile tissue of the penis in vertebrates, and the bodies of cnidarians supported?

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

Which term refers to the joints that are somewhat moveable, but do NOT have a fluid-filled capsule surrounding them, and that have fibrous connective tissue covering the ends of the bones involved?

Which molecules compose parallel bundles of thick filaments?

Which term refers to a muscle contraction where fibres cannot relax at all between stimuli?

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

What is the name of the cords of connective tissues that connect skeletal muscles to bones?

What are the A bands in skeletal muscle composed of?

What is a motor unit?

Match each molecule with its description. -troponin

Which of the following would be involved in a rapid, powerful movement of short duration that could NOT be sustained for long?

How are the bodies of arthropods supported?

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

What is the region between two adjacent Z lines?