Exam 9: Muscular System

Endomysium separates individual muscle fibers from each other.

A plank position is part of a yoga/Pilates workout. The person supports the body on the floor in a prone position with the arms and feet supporting the body. It is a little like the "up" position of a push-up, held for 30 to 60 seconds. Contraction of the abdominal muscles in a plank is most likely

The toxin that causes botulism

The muscle that adducts and flexes the arm is the

In a recording of a muscle twitch, the delay between the time a stimulus is applied and the time the muscle responds is called the

The outermost layer of connective tissue surrounding a skeletal muscle is the

A forceful, sustained muscle contraction is called a ______ ______.

Muscle atrophy that progresses with aging is caused by reduction in

Transverse tubules and sarcoplasmic reticulum are well developed in

Temporomandibular joint (TMJ) syndrome causes

Fibers of muscles whose motor neurons are severed

Binding sites on the surface of actin allow the formation of cross-bridges with molecules of

Which of the following is not true?

A motor neuron and the muscle fibers that it controls constitute a motor unit.

A sarcomere is best described as

Muscle fibers are basically a collection of

When ATP levels are low, the relationship between ATP and creatine phosphate is that

In the initiation of muscle fiber contraction, calcium ions bind to tropomyosin, exposing active sites on actin for cross-bridge formation.

The rhythmic, wavelike motion produced by smooth muscles in tubular visceral organs is called _______.

ATP is necessary for muscle relaxation.