Question 1

Explain the difference between an isotonic and isometric muscle contraction.

Accepted Answer

An isotonic muscle contraction occurs wh...

Question 2

A motor neuron and all the muscle cells it stimulates are called a motor unit.

Accepted Answer

A) True 
 B)False

Question 3

In the sliding filament model of muscle contraction,bridges are formed between the myosin and actin.

Accepted Answer

A) True 
 B)False

Question 4

Match each of the terms with its definition or explanation.
-Protein that makes the thin myofilament

Accepted Answer

A)  Skeletal muscle
B)  Smooth muscle
C)  Origin
D)  Insertion
E)  ActinF) MyosinG) Motor unitH) Neuromuscular junctionI) IsotonicJ) Isometric

Question 5

A single motor neuron with all the muscle cells it innervates is called a

Accepted Answer

A)   motor unit
B)   neuromuscular junction
C)   neurotransmitter
D)   both b and c above

Question 6

Neither the intercostal muscles nor the diaphragm can be seen from outside the body.

Accepted Answer

A) True 
 B)False

Question 7

The muscle attachment to the more stationary bone is called the

Accepted Answer

A)   origin
B)   insertion
C)   tendon
D)   bursae

Question 8

Explain how a muscle becomes fatigued.What is the oxygen debt and how is it repaid?

Accepted Answer

When a muscle becomes fatigued, it means...

Question 9

All muscles specialize in contraction or shortening.

Accepted Answer

A) True 
 B)False

Question 10

The loose connective tissue outside the muscle organs that forms a flexible,sticky "packing material" between the muscles,bone,and skin is called

Accepted Answer

A)   microfilaments
B)   fascia
C)   fascicles
D)   tendons

Question 11

In order for the necessary bridges to form,potassium must be released from the endoplasmic reticulum.

Accepted Answer

A) True 
 B)False

Question 12

Match each of the terms with its definition or explanation.
-Another name for voluntary muscle

Accepted Answer

A)  Skeletal muscle
B)  Smooth muscle
C)  Origin
D)  Insertion
E)  ActinF) MyosinG) Motor unitH) Neuromuscular junctionI) IsotonicJ) Isometric

Question 13

Tonic contractions

Accepted Answer

A)   move a muscle through a full range of motion
B)   do not shorten the muscle
C)   are important in maintaining posture
D)   both b and c above

Question 14

What allows you to lift different weights with the same muscle is the

Accepted Answer

A)   difference in the threshold stimulus
B)   number of motor units used by the muscle
C)   all-or-none law
D)   isometric contraction of the muscle fibers

Question 15

Tension during muscle lengthening is often called

Accepted Answer

A)   isotonic contractions
B)   isometric contractions
C)   eccentric contractions
D)   antagonist contractions

Question 16

All motor units in a given muscle have the same threshold stimulus.

Accepted Answer

A) True 
 B)False

Question 17

The breakdown of ATP is the energy source that helps supply heat to the body.

Accepted Answer

A) True 
 B)False

Question 18

Match the body movement term with its definition.
-Moving part of the body toward the midline of the body

Accepted Answer

A)  Flexion
B)  Extension
C)  Abduction
D)  Adduction
E)  SupinationF) PronationG) DorsiflexionH) Plantar flexionI) InversionJ) Eversion

Question 19

When calcium is released into the sarcomere

Accepted Answer

A)   it attaches to the myosin heads
B)   acts as a crossbridge between actin and myosin
C)   stimulates an ATP molecule to release energy
D)   removes the blocking protein from the actin

Question 20

The hand position when the body is in anatomical position is

Accepted Answer

A)   dorsiflexion
B)   pronation
C)   supination
D)   plantar flexion

Exam 8: Muscular System

All motor units in a given muscle have the same threshold stimulus.

Correct AnswerverifiedShow Answer

Explain how a muscle becomes fatigued.What is the oxygen debt and how is it repaid?

Correct AnswerAnswered by ExamLex AIWhen a muscle becomes fatigued, it means...View AnswerShow Answer

The loose connective tissue outside the muscle organs that forms a flexible,sticky "packing material" between the muscles,bone,and skin is called

Correct AnswerverifiedShow Answer

In the sliding filament model of muscle contraction,bridges are formed between the myosin and actin.

Correct AnswerverifiedShow Answer

Match each of the terms with its definition or explanation. -Another name for voluntary muscle

Correct AnswerverifiedShow Answer

In order for the necessary bridges to form,potassium must be released from the endoplasmic reticulum.

Correct AnswerverifiedShow Answer

A single motor neuron with all the muscle cells it innervates is called a

Correct AnswerverifiedShow Answer

Explain the difference between an isotonic and isometric muscle contraction.

Correct AnswerAnswered by ExamLex AIAn isotonic muscle contraction occurs wh...View AnswerShow Answer

The breakdown of ATP is the energy source that helps supply heat to the body.

Correct AnswerverifiedShow Answer

Neither the intercostal muscles nor the diaphragm can be seen from outside the body.

Correct AnswerverifiedShow Answer

Match each of the terms with its definition or explanation. -Protein that makes the thin myofilament

Correct AnswerverifiedShow Answer

Tension during muscle lengthening is often called

Correct AnswerverifiedShow Answer

Tonic contractions

Correct AnswerverifiedShow Answer

When calcium is released into the sarcomere

Correct AnswerverifiedShow Answer

Match the body movement term with its definition. -Moving part of the body toward the midline of the body

Correct AnswerverifiedShow Answer

A motor neuron and all the muscle cells it stimulates are called a motor unit.

Correct AnswerverifiedShow Answer

The hand position when the body is in anatomical position is

Correct AnswerverifiedShow Answer

All muscles specialize in contraction or shortening.

Correct AnswerverifiedShow Answer

The muscle attachment to the more stationary bone is called the

Correct AnswerverifiedShow Answer

What allows you to lift different weights with the same muscle is the

Correct AnswerverifiedShow Answer

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When a muscle becomes fatigued, it means...
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An isotonic muscle contraction occurs wh...
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