Question 1

The primary muscle(s) responsible for elevating the ribs during inspiration is (are)

Accepted Answer

A)  the diaphragm. 
B)  the external intercostals. 
C)  the rectus abdominis. 
D)  the internal intercostals. 
E)  the erector spinae. 
A)  the diaphragm. 
B)  the external intercostals. 
C)  the rectus abdominis. 
D)  the internal intercostals. 
E)  the erector spinae.

Question 2

Which of the following statements is FALSE?

Accepted Answer

A)  When muscles contract, the actin myofilaments are pulled towards the M-lines (the center), thus decreasing the overall sarcomere length. 
B)  During muscle contraction, the actual length of the actin and myosin molecules changes. 
C)  The sarcolemma is a specialized plasma membrane of a muscle cell. 
D)  A muscle cell is also called a muscle fiber. 
E)  Normally, skeletal muscle fibers do not contract unless they are stimulated by motor neurons. 
A)  When muscles contract, the actin myofilaments are pulled towards the M-lines (the center), thus decreasing the overall sarcomere length. 
B)  During muscle contraction, the actual length of the actin and myosin molecules changes. 
C)  The sarcolemma is a specialized plasma membrane of a muscle cell. 
D)  A muscle cell is also called a muscle fiber. 
E)  Normally, skeletal muscle fibers do not contract unless they are stimulated by motor neurons.

Question 3

Aerobic respiration

Accepted Answer

A)  results in the breakdown of glucose to yield ATP and lactic acid. 
B)  is much less efficient than anaerobic respiration 
C)  can use fatty acids and amino acids to generate ATP 
D)  can occur much faster than anaerobic respiration 
E)  all of the above are true of aerobic respiration 
A)  results in the breakdown of glucose to yield ATP and lactic acid. 
B)  is much less efficient than anaerobic respiration 
C)  can use fatty acids and amino acids to generate ATP 
D)  can occur much faster than anaerobic respiration 
E)  all of the above are true of aerobic respiration

Question 4

Elasticity is the ability of skeletal muscle to

Accepted Answer

A)  shorten with force. 
B)  lengthen passively. 
C)  respond to a stimulus. 
D)  recoil to their original resting length. 
E)  generate new collagen fibers. 
A)  shorten with force. 
B)  lengthen passively. 
C)  respond to a stimulus. 
D)  recoil to their original resting length. 
E)  generate new collagen fibers.

Question 5

-The letter A in this figure represents

Accepted Answer

A)  the A band. 
B)  the M line. 
C)  a sarcomere. 
D)  the I band. 
E)  a Z disk. 
A)  the A band. 
B)  the M line. 
C)  a sarcomere. 
D)  the I band. 
E)  a Z disk.

Question 6

Creatine phosphate

Accepted Answer

A)  is produced by the process of anaerobic respiration. 
B)  can replace ATP in binding myosin molecules during contraction. 
C)  acts as an energy reserve in muscle tissue. 
D)  is only formed during strenuous exercise. 
E)  causes the build up of lactic acid. 
A)  is produced by the process of anaerobic respiration. 
B)  can replace ATP in binding myosin molecules during contraction. 
C)  acts as an energy reserve in muscle tissue. 
D)  is only formed during strenuous exercise. 
E)  causes the build up of lactic acid.

Question 7

Which of these muscles is NOT a fixator of the scapula?

Accepted Answer

A)  latissimus dorsi 
B)  trapezius 
C)  levator scapulae 
D)  serratus anterior 
E)  pectoralis minor 
A)  latissimus dorsi 
B)  trapezius 
C)  levator scapulae 
D)  serratus anterior 
E)  pectoralis minor

Question 8

The ____________ is the end of a muscle attached to a bone undergoing the greatest movement.

Accepted Answer

A)  origin 
B)  insertion 
C)  agonist 
D)  antagonist 
E)  prime mover 
A)  origin 
B)  insertion 
C)  agonist 
D)  antagonist 
E)  prime mover

Question 9

Acetylcholine

Accepted Answer

A)  is the neurotransmitter at the neuromuscular junction. 
B)  is broken down by acetylcholinesterase. 
C)  binds to receptors on the muscle cell membrane. 
D)  causes an influx of sodium ions into the muscle cell when bound to its receptor. 
E)  has all of these characteristics. 
A)  is the neurotransmitter at the neuromuscular junction. 
B)  is broken down by acetylcholinesterase. 
C)  binds to receptors on the muscle cell membrane. 
D)  causes an influx of sodium ions into the muscle cell when bound to its receptor. 
E)  has all of these characteristics.

Question 10

The ____________ consists of only actin myofilaments.

Accepted Answer

A)  A band 
B)  I band 
C)  H zone 
D)  M line 
E)  Z disk 
A)  A band 
B)  I band 
C)  H zone 
D)  M line 
E)  Z disk

Question 11

The myosin myofilaments are anchored into the cytoskeleton of the cell by the __________.

Accepted Answer

A)  Z disks 
B)  A band 
C)  M line 
D)  I band 
E)  H zone 
A)  Z disks 
B)  A band 
C)  M line 
D)  I band 
E)  H zone

Question 12

Caffeine aids in the movement of calcium ions across membranes by both making it easier for the Ca++ channels to open and by holding the channels open longer. How would the administration of caffeine to a muscle fiber affect its contraction?

Accepted Answer

A)  Caffeine would increase the strength of the fiber's contraction. 
B)  Caffeine would allow more cross bridges to form in the fiber. 
C)  Caffeine would increase the duration of the fiber's contraction. 
D)  At high enough levels, caffeine would cause the muscle fiber to contract without a signal from the associated motor neuron. 
E)  Caffeine would have all of these effects. 
A)  Caffeine would increase the strength of the fiber's contraction. 
B)  Caffeine would allow more cross bridges to form in the fiber. 
C)  Caffeine would increase the duration of the fiber's contraction. 
D)  At high enough levels, caffeine would cause the muscle fiber to contract without a signal from the associated motor neuron. 
E)  Caffeine would have all of these effects.

Question 13

The ____________ is a muscle in a group that plays a major role in a desired movement.

Accepted Answer

A)  origin 
B)  insertion 
C)  agonist 
D)  antagonist 
E)  prime mover 
A)  origin 
B)  insertion 
C)  agonist 
D)  antagonist 
E)  prime mover

Question 14

What are the relative concentrations of Na+, K+ and dissolved proteins in the intracellular solution (i.e. cytosol) as opposed to in the extracellular fluid?

Accepted Answer

A)  $\uparrow$ Na+, $\uparrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
B)  $\uparrow$ Na+, $\downarrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
C)  $\downarrow$ Na+, $\uparrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
D)  $\downarrow$ Na+, $\downarrow$ K+, and $\downarrow$ dissolved proteins inside the cell 
A)  $\uparrow$ Na+, $\uparrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
B)  $\uparrow$ Na+, $\downarrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
C)  $\downarrow$ Na+, $\uparrow$ K+, and $\uparrow$ dissolved proteins inside the cell 
D)  $\downarrow$ Na+, $\downarrow$ K+, and $\downarrow$ dissolved proteins inside the cell

Question 15

The hip muscle commonly used as a site for injections is the

Accepted Answer

A)  gluteus maximus. 
B)  gluteus medius. 
C)  iliopsoas. 
D)  tensor fascia latae. 
E)  hamstring muscle. 
A)  gluteus maximus. 
B)  gluteus medius. 
C)  iliopsoas. 
D)  tensor fascia latae. 
E)  hamstring muscle.

Question 16

The __________ is attached to bones via tendons.

Accepted Answer

A)  myofilament 
B)  myofibril 
C)  muscle fiber 
D)  muscle fasciculus 
E)  whole skeletal muscle 
A)  myofilament 
B)  myofibril 
C)  muscle fiber 
D)  muscle fasciculus 
E)  whole skeletal muscle

Question 17

Muscles are named according to their

Accepted Answer

A)  location or number of heads. 
B)  function or action. 
C)  origin or insertion point. 
D)  size or shape. 
E)  Muscles can be named based on all of these features. 
A)  location or number of heads. 
B)  function or action. 
C)  origin or insertion point. 
D)  size or shape. 
E)  Muscles can be named based on all of these features.

Question 18

The muscle that works in opposition to another muscle is the

Accepted Answer

A)  origin. 
B)  insertion. 
C)  agonist. 
D)  antagonist. 
E)  prime mover. 
A)  origin. 
B)  insertion. 
C)  agonist. 
D)  antagonist. 
E)  prime mover.

Question 19

Carl Daver, your anatomy and physiology instructor, is conducting a field trip, and notices a dog approaching a fire hydrant. Always alert to instructional opportunities, he excitedly says, "Now watch as the dog utilizes his _____ and _____ muscles to lift his leg."

Accepted Answer

A)  iliopsoas, gluteus medius 
B)  gluteus maximus, tensor fascia latae 
C)  gluteus maximus, adductor longus 
D)  iliopsoas, quadriceps femoris 
E)  gluteus medius, adductor longus 
A)  iliopsoas, gluteus medius 
B)  gluteus maximus, tensor fascia latae 
C)  gluteus maximus, adductor longus 
D)  iliopsoas, quadriceps femoris 
E)  gluteus medius, adductor longus

Question 20

The ___________ is a group of muscle cells surrounded by perimysium.

Accepted Answer

A)  myofilament 
B)  myofibril 
C)  muscle fiber 
D)  muscle fasciculus 
E)  whole skeletal muscle 
A)  myofilament 
B)  myofibril 
C)  muscle fiber 
D)  muscle fasciculus 
E)  whole skeletal muscle

The primary muscle(s) responsible for elevating the ribs during inspiration is (are)

Which of the following statements is FALSE?

Aerobic respiration

Elasticity is the ability of skeletal muscle to

-The letter A in this figure represents

Creatine phosphate

Which of these muscles is NOT a fixator of the scapula?

The ____________ is the end of a muscle attached to a bone undergoing the greatest movement.

Acetylcholine

The ____________ consists of only actin myofilaments.

The myosin myofilaments are anchored into the cytoskeleton of the cell by the __________.

Caffeine aids in the movement of calcium ions across membranes by both making it easier for the Ca⁺⁺ channels to open and by holding the channels open longer. How would the administration of caffeine to a muscle fiber affect its contraction?

The ____________ is a muscle in a group that plays a major role in a desired movement.

What are the relative concentrations of Na⁺, K⁺ and dissolved proteins in the intracellular solution (i.e. cytosol) as opposed to in the extracellular fluid?

The hip muscle commonly used as a site for injections is the

The __________ is attached to bones via tendons.

Muscles are named according to their

The muscle that works in opposition to another muscle is the

Carl Daver, your anatomy and physiology instructor, is conducting a field trip, and notices a dog approaching a fire hydrant. Always alert to instructional opportunities, he excitedly says, "Now watch as the dog utilizes his _ and _ muscles to lift his leg."

The ___________ is a group of muscle cells surrounded by perimysium.

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Exam 7: Muscular System

The primary muscle(s) responsible for elevating the ribs during inspiration is (are)

Which of the following statements is FALSE?

Aerobic respiration

Elasticity is the ability of skeletal muscle to

-The letter A in this figure represents

Creatine phosphate

Which of these muscles is NOT a fixator of the scapula?

The ____________ is the end of a muscle attached to a bone undergoing the greatest movement.

Acetylcholine

The ____________ consists of only actin myofilaments.

The myosin myofilaments are anchored into the cytoskeleton of the cell by the __________.

Caffeine aids in the movement of calcium ions across membranes by both making it easier for the Ca++ channels to open and by holding the channels open longer. How would the administration of caffeine to a muscle fiber affect its contraction?

The ____________ is a muscle in a group that plays a major role in a desired movement.

What are the relative concentrations of Na+, K+ and dissolved proteins in the intracellular solution (i.e. cytosol) as opposed to in the extracellular fluid?

The hip muscle commonly used as a site for injections is the

The __________ is attached to bones via tendons.

Muscles are named according to their

The muscle that works in opposition to another muscle is the

Carl Daver, your anatomy and physiology instructor, is conducting a field trip, and notices a dog approaching a fire hydrant. Always alert to instructional opportunities, he excitedly says, "Now watch as the dog utilizes his _____ and _____ muscles to lift his leg."

The ___________ is a group of muscle cells surrounded by perimysium.

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Caffeine aids in the movement of calcium ions across membranes by both making it easier for the Ca⁺⁺ channels to open and by holding the channels open longer. How would the administration of caffeine to a muscle fiber affect its contraction?

What are the relative concentrations of Na⁺, K⁺ and dissolved proteins in the intracellular solution (i.e. cytosol) as opposed to in the extracellular fluid?

Carl Daver, your anatomy and physiology instructor, is conducting a field trip, and notices a dog approaching a fire hydrant. Always alert to instructional opportunities, he excitedly says, "Now watch as the dog utilizes his _ and _ muscles to lift his leg."