Question 1

The thin filaments in skeletal muscles are composed of

Accepted Answer

A) myosin 
B) actin 
C) actin, troponin, and myosin 
D) actin, troponin, and tropomyosin 
E) troponin and tropomyosin 
A) myosin 
B) actin 
C) actin, troponin, and myosin 
D) actin, troponin, and tropomyosin 
E) troponin and tropomyosin

Question 2

The dense irregular connective tissue that covers muscle fascicles and holds them together is called the

Accepted Answer

A) epimysium 
B) endomysium 
C) perimysium 
D) superficial fascia 
E) deep fascia 
A) epimysium 
B) endomysium 
C) perimysium 
D) superficial fascia 
E) deep fascia

Question 3

Slow oxidative skeletal muscle fibers fatigue easily.

Accepted Answer

A) True 
 B)False

Question 4

The space between an axon terminal of a motor neuron and the sarcolemma of a muscle fiber is called the

Accepted Answer

A) neural junction 
B) synaptic cleft 
C) synaptic vesicle 
D) motor end plate 
E) motor unit 
A) neural junction 
B) synaptic cleft 
C) synaptic vesicle 
D) motor end plate 
E) motor unit

Question 5

Muscle tone results from

Accepted Answer

A) slight contraction of all the muscle fibers in a skeletal muscle. 
B) activation of a small number of motor units within a skeletal muscle. 
C) elastic tension of the connective tissue elements of the skeletal muscle. 
D) rigor mortis. 
E) tetanus. 
A) slight contraction of all the muscle fibers in a skeletal muscle. 
B) activation of a small number of motor units within a skeletal muscle. 
C) elastic tension of the connective tissue elements of the skeletal muscle. 
D) rigor mortis. 
E) tetanus.

Question 6

Humans undergo a slow, progressive loss of skeletal muscle mass starting at about age

Accepted Answer

A) 20 
B) 30 
C) 40 
D) 50 
E) 60 
A) 20 
B) 30 
C) 40 
D) 50 
E) 60

Question 7

An individual sarcomere within a myofibril is the area between two

Accepted Answer

A) Z discs 
B) I bands 
C) A bands 
D) H zones 
E) M lines 
A) Z discs 
B) I bands 
C) A bands 
D) H zones 
E) M lines

Question 8

Motor units that contain a relatively high number of muscle fibers are used

Accepted Answer

A) to lift heavy weights. 
B) where precise control is needed. 
C) to control muscles for posture. 
D) to move the eyeballs. 
E) both where precise control is needed and to move the eyeballs. 
A) to lift heavy weights. 
B) where precise control is needed. 
C) to control muscles for posture. 
D) to move the eyeballs. 
E) both where precise control is needed and to move the eyeballs.

Question 9

Skeletal muscle tissue is striated and voluntary.

Accepted Answer

A) True 
 B)False

Question 10

The ends of axon terminals enlarge into swellings called motor end plates.

Accepted Answer

A) True 
 B)False

Question 11

Based on its name, which of the following best describes characteristics of the biceps femoris muscle?

Accepted Answer

A) Has two insertions and found in the leg. 
B) Has two bellies and found in the thigh. 
C) Has two origins and found in the thigh. 
D) Has two origins and found in the arm. 
E) Has two insertions and found in the thigh. 
A) Has two insertions and found in the leg. 
B) Has two bellies and found in the thigh. 
C) Has two origins and found in the thigh. 
D) Has two origins and found in the arm. 
E) Has two insertions and found in the thigh.

Question 12

Which of the following is NOT a characteristic used to name skeletal muscles?

Accepted Answer

A) direction of fibers 
B) thickness of fibers 
C) location 
D) size 
E) number of origins 
A) direction of fibers 
B) thickness of fibers 
C) location 
D) size 
E) number of origins

Question 13

Unfused (incomplete)tetanus involves the process of wave summation.

Accepted Answer

A) True 
 B)False

Question 14

Describe how both wave summation and motor unit recruitment are used to generate a maximal contraction in a skeletal muscle.

Accepted Answer

Wave summation involves rapidly stimulat

Question 15

Which of the following types of muscle tissue are striated and involuntary?

Accepted Answer

A) skeletal muscle 
B) cardiac muscle 
C) smooth muscle 
D) both skeletal muscle and cardiac muscle are correct 
E) both skeletal muscle and smooth muscle are correct 
A) skeletal muscle 
B) cardiac muscle 
C) smooth muscle 
D) both skeletal muscle and cardiac muscle are correct 
E) both skeletal muscle and smooth muscle are correct

Question 16

Define muscle tone.

Accepted Answer

A sustained partial contractio

Question 17

Which of the following labeled muscles on the diagram is the soleus?

Accepted Answer

A) H 
B) G 
C) L 
D) M 
E) P 
A) H 
B) G 
C) L 
D) M 
E) P

Question 18

The thick and thin filaments in smooth muscle tissue are arranged in sarcomeres (similar to skeletal muscle), while in cardiac muscle tissue, the filaments are irregularly distributed throughout the cytoplasm.

Accepted Answer

A) True 
 B)False

Question 19

A muscle that decreases the size of an opening is a

Accepted Answer

A) rotator 
B) tensor 
C) pronator 
D) sphincter 
E) depressor 
A) rotator 
B) tensor 
C) pronator 
D) sphincter 
E) depressor

Question 20

The most common form of inherited muscle-destroying disease in humans is

Accepted Answer

A) amyotrophic lateral sclerosis (ALS)or Lou Gehrig's disease 
B) Duchenne muscular dystrophy (DM
D)  
C) myasthenia gravis 
D) fasciculation 
E) multiple sclerosis (MS) 
A) amyotrophic lateral sclerosis (ALS)or Lou Gehrig's disease 
B) Duchenne muscular dystrophy (DM
D)  
C) myasthenia gravis 
D) fasciculation 
E) multiple sclerosis (MS)

Exam 8: The Muscular System

The thin filaments in skeletal muscles are composed of

The dense irregular connective tissue that covers muscle fascicles and holds them together is called the

Slow oxidative skeletal muscle fibers fatigue easily.

The space between an axon terminal of a motor neuron and the sarcolemma of a muscle fiber is called the

Muscle tone results from

Humans undergo a slow, progressive loss of skeletal muscle mass starting at about age

An individual sarcomere within a myofibril is the area between two

Motor units that contain a relatively high number of muscle fibers are used

Skeletal muscle tissue is striated and voluntary.

The ends of axon terminals enlarge into swellings called motor end plates.

Based on its name, which of the following best describes characteristics of the biceps femoris muscle?

Which of the following is NOT a characteristic used to name skeletal muscles?

Unfused (incomplete)tetanus involves the process of wave summation.

Describe how both wave summation and motor unit recruitment are used to generate a maximal contraction in a skeletal muscle.

Which of the following types of muscle tissue are striated and involuntary?

Define muscle tone.

Which of the following labeled muscles on the diagram is the soleus?

The thick and thin filaments in smooth muscle tissue are arranged in sarcomeres (similar to skeletal muscle), while in cardiac muscle tissue, the filaments are irregularly distributed throughout the cytoplasm.

A muscle that decreases the size of an opening is a

The most common form of inherited muscle-destroying disease in humans is

Organization of the Human Body

Introductory Chemistry

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

Development and Inheritance

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