Muscular System

Trying to lift a 500 pound weight would result in what type of muscle contraction?

Isometric

Lifting a book off the desk is an example of what type of contraction?

Isotonic

Which of the following is not a primary function of the muscular system?

Protection of internal organs not protected by bone

Of the following, what muscle would do the most work if you ran five miles?

Quadriceps femoris

Shaking your head "no" is what type of movement?

Rotation

Muscle tone maintains posture.

True

Shivering helps a person with hypothermia because muscle contractions produce heat.

True

Tendons attach muscle to bone at both the origin and insertion sites.

True

The continued heavy breathing after strenuous exercise is an attempt by the body to "repay" the oxygen debt.

True

The main effect of strength training is muscle atrophy.

True

When a muscle contracts, its insertion bone moves toward its origin bone.

True

Which type of muscle tissue specializes in contraction or shortening?

All of the choices

Endurance training results in...

An increase in blood vessels to a muscle

The triceps brachii and the biceps brachii...

Are antagonist of each other

Leslie's leg was in a cast for 10 weeks. You would expect her leg muscles to experience some degree of:

Atrophy

Where would you find a voluntary muscle?

Attached to the femur

The insertion of a muscle is the...

Attachment of the more movable muscle

Where is the latissimus dorsi located?

Back

In the bending of the elbow, the...

Biceps brachii is the prime mover

During strenuous exercise...

Both a and b. Help maintain posture Cause an oxygen debt in the body

The walls of the heart are made of:

Cardiac muscle

A severe tightening or shortening of a flexor muscle caused by lack of movement of a muscle...

Contracture

What muscle is located above the waist?

Deltoid

The top of the foot is elevated with the toes pointing upward. This movement is called...

Dorisflexion

The movement that is opposite of flexion is...

Extension

In bending the elbow, the insertion of the biceps brachii is at the shoulder.

False

Tendons attach bone to bone

False

The muscle cells will contract slightly for a small stimulus and much more forcefully for a stronger stimulus.

False

Twitch contractions are the normal muscle contraction used in most actions.

False

When a person picks up a 5-pound weight, muscle cells contract less forcefully than when a person picks up a 20-pound weight.

False

The tough, sheetlike membrane that covers and protects muscle is:

Fascia

What muscle movement occurs when you move your hand from an open palm to a fist?

Flexion

What muscle is located in the calf?

Gastrocnemius

Tonic contractions...

Help maintain posture

Moving a body part away from the midline of the body is called...

Abduction

Which of the following is one of the properties of muscles?

Excitability

When a muscle attaches to a bone, the end that does not move is the:

Origin

After you swallow food, what kind of muscle moves the food toward your stomach?

Smooth

Damage to a ligament results in which type of injury?

Sprain

Of the following, what muscle is superior to the other three?

Sternocleidomastoid

What muscle injury is often caused by overstretching a muscle?

Strain

One of the characteristics of muscles is extensibility. This allows muscles to:

Stretch

What is the recommended treatment for a muscle spasm in the calf?

Stretch the muscle

In extending the elbow, the...

Triceps brachii is the prime mover

A football lineman exercises to develop hypertrophy and a marathon runner exercises to increase blood supply to a muscle.

True

Adduction moves a body part toward the midline of the body.

True

Dorsiflexion and plantar flexion refer to movements of the ankle that change the position of the foot.

True

In bending the elbow, the insertion of the biceps brachii is in the forearm.

True

In the anatomical position, the hands are in the supinated position.

True