Question 1

A motor unit consists of a: 
A single motor neuron
B: Neuromuscular junctions
C: Muscle fibers
D: Several motor neurons
E: A single muscle fiber

Accepted Answer

A)  a,b,e
B)  a,b,c
C)  b,c,d
D)  a,e
E)  c,dF) B) and D)
G) C) and D)

Question 2

Which applies to synergist muscles?
A: Assist the agonist
B: Assist the antagonist
C: May stabilize the point of origin
D: May contribute to tension at the insertion site
E: Most useful at the end of a movement

Accepted Answer

A)  a,c,d,e
B)  b,c,d,e
C)  a,c,d
D)  b,c,e
E)  b,c,dF) C) and D)
G) A) and B)

Question 3

This sarcomere depicts relaxed muscle.The M line is noted by number

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  5.F) B) and C)
G) C) and E)

Question 4

During skeletal muscle contraction,more force is created when more motor units are activated.

Accepted Answer

A) True 
 B)False

Question 5

Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?

Accepted Answer

A)  Slow
B)  Fast
C)  IntermediateD) All of the above
E) None of the above

Question 6

Second-class levers are the most common in the human body.

Accepted Answer

A) True 
 B)False

Question 7

The agonist is the muscle that contracts to produce a desired movement.

Accepted Answer

A) True 
 B)False

Question 8

A term that could be used to describe the changes that occur in muscle fibers as humans age would be

Accepted Answer

A)  proliferation.
B)  hypertrophy.
C)  convergence.
D)  atrophy.
E)  myofascia.F) All of the above
G) D) and E)

Question 9

The narrow space that separates the motor neuron and the skeletal muscle fiber in a neuromuscular junction is called the

Accepted Answer

A)  motor end plate.
B)  synaptic vesicle.
C)  synaptic cleft.
D)  synaptic knob.E) B) and D)
F) None of the above

Question 10

In a sarcomere,which letter is associated with the thin dark line in the middle of an I band?

Accepted Answer

A)  A
B)  Z
C)  M
D)  HE) A) and C)
F) B) and C)

Question 11

In muscles moving the appendicular skeleton,the more ____ attachment is the most mobile.

Accepted Answer

A)   distal
B)   proximal
C)   superior
D)   inferiorE) A) and B)
F) A) and C)

Question 12

Which is the correct order of the connective tissue layers of a skeletal muscle,beginning with the most superficial?
A: Endomysium
B: Epimysium
C: Perimysium

Accepted Answer

A)  a,b,c
B)  b,a,c
C)  c,a,b
D)  b,c,a
E)  c,b,aF) A) and B)
G) C) and D)

Question 13

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Accepted Answer

A) True 
 B)False

Question 14

The functional contractile unit of a skeletal muscle fiber is called a _______________.

Accepted Answer

The answer of The functional contractile unit of a skeletal...

Question 15

An increase in the size of a muscle fiber is called _________________.

Accepted Answer

The answer of An increase in the size of a...

Question 16

The metabolic reactions within fast fibers derive much of their energy from aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 17

Which may occur as a result of muscle atrophy?

Accepted Answer

A)  Muscle size is reduced.
B)  Fibers become weaker.
C)  Muscle loses tone.
D)  Fibers waste away and die.
E)  All of the choices are correct.F) C) and D)
G) D) and E)

Question 18

Which incorrectly describes what happens during skeletal muscle contraction?

Accepted Answer

A)  The width of the A band remains constant.
B)  The H zone disappears.
C)  The Z discs of a sarcomere move farther apart.
D)  The sarcomere narrows.
E)  The I bands narrow.F) A) and E)
G) All of the above

Question 19

The structure responsible for attaching muscle to bone is a

Accepted Answer

A)  sphincter.
B)  ligament.
C)  fascia.
D)  tendon.
E)  myofibril.F) None of the above
G) C) and D)

Question 20

The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.

Accepted Answer

A) True 
 B)False

Exam 10: Muscle Tissue and Organization

Which incorrectly describes what happens during skeletal muscle contraction?

Correct AnswerverifiedShow Answer

Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?

Correct AnswerverifiedShow Answer

The metabolic reactions within fast fibers derive much of their energy from aerobic respiration.

Correct AnswerverifiedShow Answer

This sarcomere depicts relaxed muscle.The M line is noted by number

Correct AnswerverifiedShow Answer

In a sarcomere,which letter is associated with the thin dark line in the middle of an I band?

Correct AnswerverifiedShow Answer

In muscles moving the appendicular skeleton,the more ____ attachment is the most mobile.

Correct AnswerverifiedShow Answer

During skeletal muscle contraction,more force is created when more motor units are activated.

Correct AnswerverifiedShow Answer

Which is the correct order of the connective tissue layers of a skeletal muscle,beginning with the most superficial? A: Endomysium B: Epimysium C: Perimysium

Correct AnswerverifiedShow Answer

The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.

Correct AnswerverifiedShow Answer

Second-class levers are the most common in the human body.

Correct AnswerverifiedShow Answer

The functional contractile unit of a skeletal muscle fiber is called a _______________.

Correct AnswerverifiedShow Answer

An increase in the size of a muscle fiber is called _________________.

Correct AnswerverifiedShow Answer

The agonist is the muscle that contracts to produce a desired movement.

Correct AnswerverifiedShow Answer

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Correct AnswerverifiedShow Answer

The structure responsible for attaching muscle to bone is a

Correct AnswerverifiedShow Answer

Which may occur as a result of muscle atrophy?

Correct AnswerverifiedShow Answer

A term that could be used to describe the changes that occur in muscle fibers as humans age would be

Correct AnswerverifiedShow Answer

Which applies to synergist muscles? A: Assist the agonist B: Assist the antagonist C: May stabilize the point of origin D: May contribute to tension at the insertion site E: Most useful at the end of a movement

Correct AnswerverifiedShow Answer

The narrow space that separates the motor neuron and the skeletal muscle fiber in a neuromuscular junction is called the

Correct AnswerverifiedShow Answer

A motor unit consists of a: A single motor neuron B: Neuromuscular junctions C: Muscle fibers D: Several motor neurons E: A single muscle fiber

Correct AnswerverifiedShow Answer

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