Exam 7: Muscle Physiology

Atrophy can develop in a muscle by either denervation or disuse.

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -has myosin ATPase activity

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -the most powerful fibre

____________________ proteins are calcium-release channels in the muscle cell.

Which of the following directly blocks cross bridge interaction between actin and myosin in skeletal muscle

____________________ occurs when acetylcholine is no longer available in adequate amounts to stimulate muscle fibres.

Match the skeletal muscle proteins, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -found in the sarcomere

The _____________________ is the descending pathway that is concerned primarily with regulation of posture involving involuntary movements of the trunk and limbs.

Fast-glycolytic muscle fibres do not require as much oxygen use as slow-oxidative fibres.

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -most resistant to fatigue

Which of these statements describes myoglobin

A skeletal muscle produces motion by pulling the origin toward its insertion.

With twitch summation, the muscle fibre is stimulated so rapidly that it does not have an opportunity to return to resting potential between stimuli.

Skeletal muscles are capable of limited repair after injury.

The regulation of smooth muscle contraction is mediated by the phosphorylation of which filaments in response to calcium binding to proteins

Foot proteins link the actin molecules together within a thin filament.

____________________ refers to the series of events linking muscle excitation to muscle contraction.

Which of these actions is involved in developing tension in muscle fibres

Which of the following happens during a cross-bridge cycle in skeletal muscle

The ____________________ is the descending motor pathway that mediates performance of fine, discrete voluntary movements of the hands.