Question 1

Flexion at the knee involves ________.

Accepted Answer

A)  isotonic contraction of both the hamstring group and the quadriceps femoris group 
B)  eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group 
C)  concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group 
D)  isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group 
A)  isotonic contraction of both the hamstring group and the quadriceps femoris group 
B)  eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group 
C)  concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group 
D)  isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group C

Question 2

If your lab partner measures the angle formed between your arm and your shoulder as you adduct your arm such that it crosses anterior to your torso,which type of flexibility is being measured?

Accepted Answer

A)  static 
B)  dynamic 
C)  goniometer 
D)  muscle 
A)  static 
B)  dynamic 
C)  goniometer 
D)  muscle A

Question 3

How do dynamic and static flexibility differ?

Accepted Answer

A)  Dynamic flexibility considers resistance to a motion as well as the difficulty of a movement. 
B)  Dynamic flexibility only measures range of motion. 
C)  Static flexibility considers resistance to a motion as well as the difficulty of a movement. 
D)  There is no difference between the two. 
A)  Dynamic flexibility considers resistance to a motion as well as the difficulty of a movement. 
B)  Dynamic flexibility only measures range of motion. 
C)  Static flexibility considers resistance to a motion as well as the difficulty of a movement. 
D)  There is no difference between the two. A

Question 4

A motor neuron and all the muscle fibers it controls is called a ________.

Accepted Answer

A)  neuromuscular junction 
B)  threshold stimulus 
C)  motor nerve 
D)  motor unit 
A)  neuromuscular junction 
B)  threshold stimulus 
C)  motor nerve 
D)  motor unit

Question 5

Which activity will result in the recruitment of the highest number of motor units?

Accepted Answer

A)  lifting a 10-lb barbell 
B)  lifting a 2-lb barbell 
C)  lifting a 25-lb barbell 
D)  lifting a 5-lb barbell 
A)  lifting a 10-lb barbell 
B)  lifting a 2-lb barbell 
C)  lifting a 25-lb barbell 
D)  lifting a 5-lb barbell

Question 6

After a period of intense exercise,the build-up of lactic acid leads to ________.

Accepted Answer

A)  oxygen debt 
B)  glycolysis 
C)  the Cori cycle 
D)  muscle fatigue 
A)  oxygen debt 
B)  glycolysis 
C)  the Cori cycle 
D)  muscle fatigue

Question 7

The speed of muscle contraction is ________ related to load.

Accepted Answer

A)  indirectly 
B)  not 
C)  directly 
D)  inversely 
A)  indirectly 
B)  not 
C)  directly 
D)  inversely

Question 8

The activation of increasing numbers of motor units is known as ________.

Accepted Answer

A)  motor unit recruitment 
B)  muscle fatigue 
C)  muscle tension 
D)  threshold stimulus 
A)  motor unit recruitment 
B)  muscle fatigue 
C)  muscle tension 
D)  threshold stimulus

Question 9

Extension at the knee involves ________.

Accepted Answer

A)  concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group 
B)  eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group 
C)  isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group 
D)  isotonic contraction of both the hamstring group and the quadriceps femoris group 
A)  concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group 
B)  eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group 
C)  isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group 
D)  isotonic contraction of both the hamstring group and the quadriceps femoris group

Question 10

Production and accumulation of ________ in muscle cells leads to muscle fatigue.

Accepted Answer

A)  lactic acid 
B)  ATP 
C)  glucose 
D)  glycogen 
A)  lactic acid 
B)  ATP 
C)  glucose 
D)  glycogen

Question 11

Using your hands and forearms to push against--but not move--a brick wall involves which of the following?

Accepted Answer

A)  isotonic contraction 
B)  concentric contraction 
C)  isometric contraction 
D)  eccentric contraction 
A)  isotonic contraction 
B)  concentric contraction 
C)  isometric contraction 
D)  eccentric contraction

Question 12

A period of sustained muscle contraction is called ________.

Accepted Answer

A)  tetanus 
B)  lockjaw 
C)  incomplete tetanus 
D)  muscle tension 
A)  tetanus 
B)  lockjaw 
C)  incomplete tetanus 
D)  muscle tension

Question 13

Static flexibility is measured with a ________.

Accepted Answer

A)  yard stick 
B)  protractor 
C)  ruler 
D)  goniometer 
A)  yard stick 
B)  protractor 
C)  ruler 
D)  goniometer

Question 14

The range of motion at a joint is called ________.

Accepted Answer

A)  static flexibility 
B)  flexibility 
C)  muscle fatigue 
D)  dynamic flexibility 
A)  static flexibility 
B)  flexibility 
C)  muscle fatigue 
D)  dynamic flexibility

Question 15

Of the activities listed below,which relies primarily on isometric contractions?

Accepted Answer

A)  answering the telephone 
B)  bending down to pick up a textbook 
C)  throwing a ball 
D)  sitting in an upright position 
A)  answering the telephone 
B)  bending down to pick up a textbook 
C)  throwing a ball 
D)  sitting in an upright position

Question 16

An individual's measured range of motion upon abduction of the right shoulder is 90 degrees and upon adduction is 120 degrees.Which of the following statements about range of motion is true?

Accepted Answer

A)  The range of motion at the shoulder joint is above average for adduction and above average for adduction. 
B)  The range of motion at the shoulder joint is above average for each movement. 
C)  The range of motion at the shoulder joint is below average for both abduction and adduction. 
D)  The range of motion at the shoulder joint is below average for adduction and normal for adduction. 
A)  The range of motion at the shoulder joint is above average for adduction and above average for adduction. 
B)  The range of motion at the shoulder joint is above average for each movement. 
C)  The range of motion at the shoulder joint is below average for both abduction and adduction. 
D)  The range of motion at the shoulder joint is below average for adduction and normal for adduction.

Question 17

Why is it easier to lift an ink pen than it is to lift a 25-lb barbell?

Accepted Answer

A)  It requires fewer motor units to lift the ink pen. 
B)  It takes more time for muscle tension to exceed the load of a light object than a heavy object. 
C)  The time for muscle tension to exceed load is not dependent on the mass of an object. 
D)  It takes less time for muscle tension to exceed the load of a heavy object than a light object. 
A)  It requires fewer motor units to lift the ink pen. 
B)  It takes more time for muscle tension to exceed the load of a light object than a heavy object. 
C)  The time for muscle tension to exceed load is not dependent on the mass of an object. 
D)  It takes less time for muscle tension to exceed the load of a heavy object than a light object.

Question 18

Lifting a 25-lb barbell by flexing your forearm requires ________.

Accepted Answer

A)  the biceps brachii to contract concentrically and the triceps brachii to contract eccentrically 
B)  eccentric contraction of both the biceps brachii and triceps brachii 
C)  the biceps brachii to contract eccentrically and the triceps brachii to contract concentrically 
D)  Isometric contraction of the biceps brachii and concentric contraction of the triceps brachii 
A)  the biceps brachii to contract concentrically and the triceps brachii to contract eccentrically 
B)  eccentric contraction of both the biceps brachii and triceps brachii 
C)  the biceps brachii to contract eccentrically and the triceps brachii to contract concentrically 
D)  Isometric contraction of the biceps brachii and concentric contraction of the triceps brachii

Question 19

Isotonic muscle contractions differ from isometric contractions because isotonic contractions ________.

Accepted Answer

A)  result in lengthening of the muscle 
B)  involve movement of the muscle and body structures 
C)  do not involve shortening of a muscle 
D)  result in shortening of the muscle 
A)  result in lengthening of the muscle 
B)  involve movement of the muscle and body structures 
C)  do not involve shortening of a muscle 
D)  result in shortening of the muscle

Question 20

Which of the following must occur for muscles to recover from fatigue?

Accepted Answer

A)  ATP is produced via aerobic respiration. 
B)  Lactic acid builds up in the sarcolemma of muscle cells. 
C)  Muscle cells start to make ATP in anaerobic conditions. 
D)  Lactic acid is metabolized to pyruvate or glucose and ATP reserves are restored. 
A)  ATP is produced via aerobic respiration. 
B)  Lactic acid builds up in the sarcolemma of muscle cells. 
C)  Muscle cells start to make ATP in anaerobic conditions. 
D)  Lactic acid is metabolized to pyruvate or glucose and ATP reserves are restored.

Exam 13: Physiology of the Muscular System

Flexion at the knee involves ________.

If your lab partner measures the angle formed between your arm and your shoulder as you adduct your arm such that it crosses anterior to your torso,which type of flexibility is being measured?

How do dynamic and static flexibility differ?

A motor neuron and all the muscle fibers it controls is called a ________.

Which activity will result in the recruitment of the highest number of motor units?

After a period of intense exercise,the build-up of lactic acid leads to ________.

The speed of muscle contraction is ________ related to load.

The activation of increasing numbers of motor units is known as ________.

Extension at the knee involves ________.

Production and accumulation of ________ in muscle cells leads to muscle fatigue.

Using your hands and forearms to push against--but not move--a brick wall involves which of the following?

A period of sustained muscle contraction is called ________.

Static flexibility is measured with a ________.

The range of motion at a joint is called ________.

Of the activities listed below,which relies primarily on isometric contractions?

An individual's measured range of motion upon abduction of the right shoulder is 90 degrees and upon adduction is 120 degrees.Which of the following statements about range of motion is true?

Why is it easier to lift an ink pen than it is to lift a 25-lb barbell?

Lifting a 25-lb barbell by flexing your forearm requires ________.

Isotonic muscle contractions differ from isometric contractions because isotonic contractions ________.

Which of the following must occur for muscles to recover from fatigue?

Body Organization and Terminology

Care and Use of the Compound Light Microscope

Cell Structure and Cell Division

Membrane Transport

Tissues

The Integumentary System

Introduction to the Skeletal System and the Axial Skeleton

The Appendicular Skeleton

Articulations

Introduction to Skeletal Muscle

Muscles of the Head, Neck, and Trunk

Muscles of the Upper and Lower Limbs

Nervous Tissue

The Brain and Cranial Nerves

The Spinal Cord and Spinal Nerves

Human Reflex Physiology

Special Senses

The Endocrine System

Blood Cells

Gross Anatomy of the Heart

Anatomy of Blood Vessels

Cardiovascular Physiology

The Lymphatic System

Anatomy of the Respiratory System

Respiratory Physiology

Anatomy of the Digestive System

Actions of a Digestive Enzyme

Anatomy of the Urinary System

Urinary Physiology

The Male Reproductive System

The Female Reproductive System

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