Question 1

The muscles of the back that help maintain upright posture while standing still are undergoing what type of contractions?

Accepted Answer

A)  Isotonic contractions 
B)  Isometric contractions 
A)  Isotonic contractions 
B)  Isometric contractions

Question 2

During the motion that extends the upper limb at the elbow, the triceps brachii represents which part of the lever?

Accepted Answer

A)  Rigid bar 
B)  Fulcrum 
C)  Force 
D)  Resistance 
E)  Handle 
A)  Rigid bar 
B)  Fulcrum 
C)  Force 
D)  Resistance 
E)  Handle

Question 3

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

Accepted Answer

A)  Multiunit smooth muscle 
B)  Visceral smooth muscle 
C)  Skeletal muscle 
D)  Cardiac muscle 
A)  Multiunit smooth muscle 
B)  Visceral smooth muscle 
C)  Skeletal muscle 
D)  Cardiac muscle

Question 4

What term refers to the attachment point for the movable end of the muscle?

Accepted Answer

A)  Origin 
B)  Fulcrum 
C)  Insertion 
D)  Motor end plate 
E)  Source 
A)  Origin 
B)  Fulcrum 
C)  Insertion 
D)  Motor end plate 
E)  Source

Question 5

A(n) __________ is a single contraction of a muscle fiber in response to a single stimulus.

Accepted Answer

A)  sustained contraction 
B)  threshold stimulus 
C)  twitch 
D)  cramp 
E)  all-or-none response 
A)  sustained contraction 
B)  threshold stimulus 
C)  twitch 
D)  cramp 
E)  all-or-none response

Question 6

Consider a muscle that originates on the posterior femur and inserts on the posterior tibia. What is the action of this muscle?

Accepted Answer

A)  To flex the knee 
B)  To flex the hip 
C)  To extend the knee 
D)  To extend the hip 
A)  To flex the knee 
B)  To flex the hip 
C)  To extend the knee 
D)  To extend the hip

Question 7

What type of smooth muscle is found in the wall of the stomach?

Accepted Answer

A)  Striated muscle 
B)  Visceral muscle 
C)  Multiunit muscle 
D)  Intercalated muscle 
A)  Striated muscle 
B)  Visceral muscle 
C)  Multiunit muscle 
D)  Intercalated muscle

Question 8

Using the muscle name as a clue, where is the tibialis posterior muscle located?

Accepted Answer

A)  At the buttocks 
B)  At the back of the calf 
C)  At the back of the arm 
D)  Over the top of the foot 
E)  Deep to the shoulder blade 
A)  At the buttocks 
B)  At the back of the calf 
C)  At the back of the arm 
D)  Over the top of the foot 
E)  Deep to the shoulder blade

Question 9

What is the effect of ATP binding to myosin?

Accepted Answer

A)  Cross-bridges form 
B)  Cross-bridges break 
C)  Troponin and tropomyosin interact to expose binding sites on actin 
D)  Thin filaments become shorter, causing shortening of the sarcomere 
A)  Cross-bridges form 
B)  Cross-bridges break 
C)  Troponin and tropomyosin interact to expose binding sites on actin 
D)  Thin filaments become shorter, causing shortening of the sarcomere

Question 10

ATP is necessary for muscle relaxation.

Accepted Answer

A) True 
 B)False

Question 11

What molecule, only present in muscle cells, is used to temporarily store oxygen for use in aerobic respiration?

Accepted Answer

A)  Myoglobin 
B)  Acetylcholine 
C)  Creatine phosphate 
D)  Lactic acid 
E)  Pyruvic acid 
A)  Myoglobin 
B)  Acetylcholine 
C)  Creatine phosphate 
D)  Lactic acid 
E)  Pyruvic acid

Question 12

In skeletal muscle cells, what molecule can be used to transfer energy to ADP in order to form ATP?

Accepted Answer

A)  Acetylcholine 
B)  Troponin 
C)  Actin 
D)  Creatinephosphate 
E)  Glucose 
A)  Acetylcholine 
B)  Troponin 
C)  Actin 
D)  Creatinephosphate 
E)  Glucose

Question 13

What causes the rigor mortis that occurs in skeletal muscles after death?

Accepted Answer

A)  Increase in available ATP, and decreased membrane permeability to calcium ions 
B)  Decrease in available ATP, and increased membrane permeability to calcium ions 
C)  Persistent stimulation by motor neuron 
D)  Decrease in the number of muscle fibers 
E)  Increase in membrane leakiness to sodium, resulting in continuing action potentials 
A)  Increase in available ATP, and decreased membrane permeability to calcium ions 
B)  Decrease in available ATP, and increased membrane permeability to calcium ions 
C)  Persistent stimulation by motor neuron 
D)  Decrease in the number of muscle fibers 
E)  Increase in membrane leakiness to sodium, resulting in continuing action potentials

Question 14

What is an example of a partial but sustained contraction of a whole muscle?

Accepted Answer

A)  Blinking an eyelid 
B)  Tetanic contraction 
C)  Muscle twitch 
D)  Maintenance of posture 
E)  Motor unit fatigue 
A)  Blinking an eyelid 
B)  Tetanic contraction 
C)  Muscle twitch 
D)  Maintenance of posture 
E)  Motor unit fatigue

Question 15

Muscles that assist a prime mover in causing a movement are called _______________.

Accepted Answer

The answer of Muscles that assist a prime mover in...

Question 16

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

Accepted Answer

A)  Development of more extensive capillary networks; cells develop more mitochondria 
B)  Formation of more actin and myosin, causing enlargement of muscle fibers 
C)  Loss of myoglobin and reduction in size of muscle fibers 
D)  Drastic increase in number of muscle fibers 
A)  Development of more extensive capillary networks; cells develop more mitochondria 
B)  Formation of more actin and myosin, causing enlargement of muscle fibers 
C)  Loss of myoglobin and reduction in size of muscle fibers 
D)  Drastic increase in number of muscle fibers

Question 17

As you go to lift your backpack off of the floor, there is a period of time when the muscles of your arm and back are contracting but your backpack has yet to move. The muscles are developing tension before they begin to shorten and before the bag begins to be lifted. This type of contraction is called an __________ contraction.

Accepted Answer

A)  isotonic 
B)  isometric 
A)  isotonic 
B)  isometric

Question 18

Endomysium separates individual muscle fibers from each other.

Accepted Answer

A) True 
 B)False

Question 19

The rhythmic, wavelike motion produced by visceral smooth muscle is called __________.

Accepted Answer

The answer of The rhythmic, wavelike motion produced by visceral...

Question 20

What statement describes the zygomaticusmuscle?

Accepted Answer

A)  It inserts on the coronoidprocess of the mandible. 
B)  It elevates the corner of the mouth. 
C)  It brings the head into an upright position. 
D)  It closes the lips. 
A)  It inserts on the coronoidprocess of the mandible. 
B)  It elevates the corner of the mouth. 
C)  It brings the head into an upright position. 
D)  It closes the lips.

The muscles of the back that help maintain upright posture while standing still are undergoing what type of contractions?

During the motion that extends the upper limb at the elbow, the triceps brachii represents which part of the lever?

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

What term refers to the attachment point for the movable end of the muscle?

A(n) __________ is a single contraction of a muscle fiber in response to a single stimulus.

Consider a muscle that originates on the posterior femur and inserts on the posterior tibia. What is the action of this muscle?

What type of smooth muscle is found in the wall of the stomach?

Using the muscle name as a clue, where is the tibialis posterior muscle located?

What is the effect of ATP binding to myosin?

ATP is necessary for muscle relaxation.

What molecule, only present in muscle cells, is used to temporarily store oxygen for use in aerobic respiration?

In skeletal muscle cells, what molecule can be used to transfer energy to ADP in order to form ATP?

What causes the rigor mortis that occurs in skeletal muscles after death?

What is an example of a partial but sustained contraction of a whole muscle?

Muscles that assist a prime mover in causing a movement are called _______________.

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

Endomysium separates individual muscle fibers from each other.

The rhythmic, wavelike motion produced by visceral smooth muscle is called __________.

What statement describes the zygomaticusmuscle?

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

Cells

Cellular Metabolism

Tissues

Integumentary System

Skeletal System

Pregnancy, Growth, Development, and Genetics

Nervous System

The Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

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Exam 8: Muscular System

The muscles of the back that help maintain upright posture while standing still are undergoing what type of contractions?

During the motion that extends the upper limb at the elbow, the triceps brachii represents which part of the lever?

What type of smooth muscle consists of muscle fibers that are separate rather than organized into sheets?

What term refers to the attachment point for the movable end of the muscle?

A(n) __________ is a single contraction of a muscle fiber in response to a single stimulus.

Consider a muscle that originates on the posterior femur and inserts on the posterior tibia. What is the action of this muscle?

What type of smooth muscle is found in the wall of the stomach?

Using the muscle name as a clue, where is the tibialis posterior muscle located?

What is the effect of ATP binding to myosin?

ATP is necessary for muscle relaxation.

What molecule, only present in muscle cells, is used to temporarily store oxygen for use in aerobic respiration?

In skeletal muscle cells, what molecule can be used to transfer energy to ADP in order to form ATP?

What causes the rigor mortis that occurs in skeletal muscles after death?

What is an example of a partial but sustained contraction of a whole muscle?

Muscles that assist a prime mover in causing a movement are called _______________.

With training, what changes will occur in the muscles of the lower limbs of a marathon runner?

Endomysium separates individual muscle fibers from each other.

The rhythmic, wavelike motion produced by visceral smooth muscle is called __________.

What statement describes the zygomaticusmuscle?

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

Cells

Cellular Metabolism

Tissues

Integumentary System

Skeletal System

Pregnancy, Growth, Development, and Genetics

Nervous System

The Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Digestion and Nutrition

Respiratory System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Filters