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