Muscle Multiple Choice Practice

these are from the multiple choice quizzes on visible body

Rectus

This muscle of the eye has long straight fibers and is approximately the shape of a rectangle. Which of the following terms best fits this description?

Trapezius

Which term best describes the shape of the muscle shown here?

Pectoral

Identify the muscle shown here.

Longissimus

If one muscle in a group is much longer than the others, which of the following terms would you expect to be contained in its name?

Located deep to a similar muscle

If a muscle has the term “profundus” in its name, that indicates the muscle is…

The muscle is not the largest or smallest of a set of three similar muscles.

During a cadaver dissection, if your instructor referred to a muscle with the term “medius” in its name, you would expect that…

The head

Based on its name, which of the following structures would you expect the splenius capitis muscle to move?

Digiti

Which of the following terms would a muscle that extends a finger like have in its name?

The lip

Based on its name, which of the following structures would you expect the elevator labii superiors muscle to move?

Rhomboideus

Identify the muscle shown here. 

Serratus

Identify the muscle shown here.

Orbicularis

Which term best describes the fiber orientation of this muscle?

Transverse

This muscle stretches across the larynx. Which term best describes its fibers?

Obliquus

This muscle turns the head laterally to the right when contracted. Which term best describes its fiber orientation?

2 origins, 1 insertion

The depicted muscle, the biceps brachii, has

Origins typically do not move when the muscle contracts, whereas insertions do. Origins are the more proximal of the two points.

What is the difference between muscle origins and insertions?

Through mechanical and chemical processes that occur in the alimentary canal- a musculomembranous tube that extends from the mouth to the anus- food is digested, nutrients are extracted, and waste is expelled. 

If you were giving an oral report on the role smooth muscle plays in the process of digestion, which of the following points would you include in your presentation?

Its fibers are shorter

How does cardiac muscle differ from skeletal muscle?

It passes through the bronchioles and tertiary and secondary bronchi in the lungs to the right or left bronchi, and then it goes into the trachea and up through the larynx to pass out of the body via the mouth or nose.

How would you explain the path exhaled oxygen-poor and carbon dioxide-rich air takes to leave the body?

The brain

Smooth muscle lines all of the following body structure except

Involuntary, autonomic

Smooth muscle contractions are __ actions managed by impulses that travel through the _ nervous system to the smooth muscle tissue.

Pacemaker cells

_ are specialized cardiac muscle cells that directly control heart rate.

It creates the pumping action that distributes blood throughout the cardiovascular system.

If one of your peers asked you to explain the main function of the myocardium, how would you explain it?

Oblique layer

Which smooth muscle layer is found in the stomach but not in the rest of the alimentary canal?

It is made up of muscle fibers attached to fibrous rings.

If you were to describe the myocardium to a friend who is unfamiliar with its structure, which of the following would you be most likely to say?

Epicardium

Which layer of the heart wall adheres the heart to the pericardium, a sac of tissue that protects the heart from friction as it beats?

Calcium ions released from the sarcoplasmic reticulum power the movement of the myosin head.

All of the following are steps in the cross-bridge formation process except

Sarcoplasmic reticulum

Surrounding the myofibrils are membranous sacs called the

Myosin, actin

Sarcomeres contain thick filaments, which consist of _ , and thin filaments, which consist of _.

Impulses from the nervous system move away from the neuromuscular junction

If one of your friends asked you to explain how body movement occurs, which of the following steps would not be included in your explanation?

When the myosin heads bind to actin, the cross bridges are established

Which of the following describes the relationship between myosin and actin?

Epimysium

A layer of connective tissue called the _ protects each skeletal muscle.

Nervous system

Which body system initiates the process of muscle contraction?

when the thick and thin filaments of a sarcomere slide across each other

Which of the following creates a muscle contraction?

They all look the same because in actin and myosin always have the same microscopic organization

All of the following are common properties among skeletal, cardiac, and smooth muscle except

A signal begins in the brain and travels down the spinal cord to peripheral nerves until it reaches a muscle

Which of the following describes how messages travel from the brain to muscles?