Exam 6: Muscle Physiology

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by using the following code (options may be used more than once or not at all). -possess cross bridges

Indicate which type of muscle is associated with the property in question by using the answer code (options may be used more than once or not at all). -maintains a constant resting membrane potential unless stimulated

Which statement regarding contraction in skeletal and smooth muscle is correct?

Gradation of muscle contraction can be accomplished by stimulating variable portions of each motor unit.

What is the term for the region between two Z lines?

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all). -found predominantly in muscles designed for endurance

Single-unit smooth muscle and cardiac muscle are both self-excitable.

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all). -uses up considerable glycogen

What does NOT directly influence motor neurons?

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Indicate which characteristic applies to which type of muscle by using the answer code (options may be used more than once or not at all). -important in maintaining posture

Match the sarcomere component with the correct characteristic by using the answer code (options may be used more than once or not at all). -contains only thick filaments

Which statement is NOT characteristic of cross bridges?

Which statement is correct for fast-glycolytic (type IIb)fibres?

Which of the following is the first step in excitation-contraction coupling?

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all). -has numerous mitochondria

Which statement concerning pacemaker activity is correct?

Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank by using the answer code (options may be used more than once or not at all). -shortens during muscle contraction

The immediate source for supplying additional ATP at the onset of exercise is ____________________.