Exam 8: Muscle Physiology

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code (more than one answer may apply): -Is most resistant to fatigue.

If a muscle cell is excited ____________________ is released from the sarcoplasmic reticulum.

All smooth muscle is myogenic.

The accompanying figure relates to pathways involved in stretch reflex. Match the steps highlighted in the figure (steps 1-4) with the statements using the letter key below. -Gamma motor neuron output to muscle spindle fibers

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

When a muscle atrophies,

The regulation of smooth muscle contraction is mediated by the phosphorylation of ____ in response to calcium binding to ____.

The striated appearance of skeletal muscle is due to the

The striated appearance of skeletal muscle is due to the

Which of the following statements concerning the length-tension relationship is incorrect?

Indicate which characteristic applies to which type of muscle. -Tension remains constant.

Intrafusal muscle fibers

Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank using the answer code below (more than one answer may apply): -Composed of thick and thin filaments.

Compare the major characteristics of the three types of skeletal muscle fibers.

The accompanying figure relates to pathways involved in stretch reflex. Match the steps highlighted in the figure (steps 1-4) with the statements using the letter key below. -Afferent input from muscle spindle

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Is considered to be involuntary.

During muscle contraction, the

The functional unit of skeletal muscle is the myofibril.

Troponin

The greater the load, the lower the velocity at which the muscle fiber shortens.