Question 1

Rigor mortis generally lasts for

Accepted Answer

A)  6 - 12 hours. 
B)  12 - 24 hours. 
C)  24 - 36 hours. 
D)  24 - 60 hours. 
E)  one week. 
A)  6 - 12 hours. 
B)  12 - 24 hours. 
C)  24 - 36 hours. 
D)  24 - 60 hours. 
E)  one week. D

Question 2

A short-lived contraction of the cells in a motor unit is known as a

Accepted Answer

A)  muscle twitch. 
B)  tetanus response. 
C)  spasm. 
D)  contracture. 
E)  treppe. 
A)  muscle twitch. 
B)  tetanus response. 
C)  spasm. 
D)  contracture. 
E)  treppe. A

Question 3

Myotonic muscular dystrophy generally affects

Accepted Answer

A)  the entire body. 
B)  the hands and feet. 
C)  the back muscles. 
D)  the neck muscles. 
E)  the abdominal muscles. 
A)  the entire body. 
B)  the hands and feet. 
C)  the back muscles. 
D)  the neck muscles. 
E)  the abdominal muscles. B

Question 4

The biceps muscle extends from the shoulder to the lower arm and raises the lower arm. The ____ is on the lower arm.

Accepted Answer

A)  origin 
B)  elevator 
C)  fulcrum 
D)  insertion 
E)  flexor 
A)  origin 
B)  elevator 
C)  fulcrum 
D)  insertion 
E)  flexor

Question 5

The body contains approximately ____ muscles.

Accepted Answer

A)  206 
B)  350 
C)  475 
D)  525 
E)  600 
A)  206 
B)  350 
C)  475 
D)  525 
E)  600

Question 6

The human biceps and triceps muscles may be described best as working

Accepted Answer

A)  independently. 
B)  synergistically. 
C)  antagonistically. 
D)  synchronistically. 
E)  involuntarily. 
A)  independently. 
B)  synergistically. 
C)  antagonistically. 
D)  synchronistically. 
E)  involuntarily.

Question 7

A steady, low-level contraction of a muscle is referred to as

Accepted Answer

A)  tetanus. 
B)  treppe. 
C)  spasm. 
D)  tone. 
E)  fatigue. 
A)  tetanus. 
B)  treppe. 
C)  spasm. 
D)  tone. 
E)  fatigue.

Question 8

Small extensions of the muscle cell's plasma membrane that connect with myofibrils are called

Accepted Answer

A)  T tubules. 
B)  cross-bridges. 
C)  sarcoplasmic reticulum. 
D)  neuromuscular junctions. 
E)  neurotransmitters. 
A)  T tubules. 
B)  cross-bridges. 
C)  sarcoplasmic reticulum. 
D)  neuromuscular junctions. 
E)  neurotransmitters.

Question 9

Tissue-building steroids are known as

Accepted Answer

A)  catabolic. 
B)  metabolic. 
C)  anabolic. 
D)  actinic. 
E)  nicotinic. 
A)  catabolic. 
B)  metabolic. 
C)  anabolic. 
D)  actinic. 
E)  nicotinic.

Question 10

The most common disorders of skeletal muscles are

Accepted Answer

A)  infections. 
B)  diseases. 
C)  fatigue. 
D)  injuries. 
E)  loss of fibers. 
A)  infections. 
B)  diseases. 
C)  fatigue. 
D)  injuries. 
E)  loss of fibers.

Question 11

A strap of dense connective tissue that connects muscle to bone is (a)

Accepted Answer

A)  ligament. 
B)  cartilage. 
C)  myofibril. 
D)  tendon. 
E)  filament. 
A)  ligament. 
B)  cartilage. 
C)  myofibril. 
D)  tendon. 
E)  filament.

Question 12

Match between columns
                        Premises: Which is a major muscle of the rear upper leg?
Which muscle is antagonistic to the action of the biceps?
Which muscle is located on the upper shoulder?
Which muscle is a principal muscle of the lower leg?
Which muscle is the principal muscle extending across the chest?

Accepted Answer

The Answer of triceps and pectoralis major and gastrocnemius and is...

Question 13

Red muscle appears that way due to the presence of

Accepted Answer

A)  hemoglobin. 
B)  iron. 
C)  myoglobin. 
D)  ATP. 
E)  glucose. 
A)  hemoglobin. 
B)  iron. 
C)  myoglobin. 
D)  ATP. 
E)  glucose.

Question 14

At about what age does the tension, or physical force, a person's muscles can muster begin to decrease?

Accepted Answer

A)  30 
B)  25 
C)  40 
D)  45 
E)  50 
A)  30 
B)  25 
C)  40 
D)  45 
E)  50

Question 15

For maximum effect, one should

Accepted Answer

A)  perform strength training only. 
B)  perform aerobic exercise only. 
C)  perform both aerobic exercises and strength training. 
D)  perform much strength training and only a little aerobic exercise. 
E)  perform much aerobic exercise and only a little strength training. 
A)  perform strength training only. 
B)  perform aerobic exercise only. 
C)  perform both aerobic exercises and strength training. 
D)  perform much strength training and only a little aerobic exercise. 
E)  perform much aerobic exercise and only a little strength training.

Question 16

What results when muscles use more ATP than respiration can deliver?

Accepted Answer

A)  glycogen buildup 
B)  pyruvate production 
C)  oxygen debt 
D)  shallow breathing 
E)  muscle damage 
A)  glycogen buildup 
B)  pyruvate production 
C)  oxygen debt 
D)  shallow breathing 
E)  muscle damage

Question 17

Tendon sheaths are used to

Accepted Answer

A)  reduce friction. 
B)  protect joints. 
C)  protect muscles. 
D)  attach tendons to each other. 
E)  stabilize joints. 
A)  reduce friction. 
B)  protect joints. 
C)  protect muscles. 
D)  attach tendons to each other. 
E)  stabilize joints.

Question 18

A painful muscle spasm that doesn't immediately release is a(n)

Accepted Answer

A)  inflammation. 
B)  muscle tear. 
C)  cramp. 
D)  isotonic contraction. 
E)  dystrophy. 
A)  inflammation. 
B)  muscle tear. 
C)  cramp. 
D)  isotonic contraction. 
E)  dystrophy.

Question 19

In their action, muscles would be most like

Accepted Answer

A)  ropes. 
B)  levers. 
C)  push rods. 
D)  screws. 
E)  hammers. 
A)  ropes. 
B)  levers. 
C)  push rods. 
D)  screws. 
E)  hammers.

Question 20

Reciprocal innervation of reflexes between antagonistic muscle pairs

Accepted Answer

A)  is the usual basis of coordinated contractions. 
B)  is the means by which rods prevent cones from being stimulated. 
C)  refers to the lens adjustments that bring about precise focusing onto the retina. 
D)  explains the mechanism for the operation of the calcium pump. 
E)  is a protective function only. 
A)  is the usual basis of coordinated contractions. 
B)  is the means by which rods prevent cones from being stimulated. 
C)  refers to the lens adjustments that bring about precise focusing onto the retina. 
D)  explains the mechanism for the operation of the calcium pump. 
E)  is a protective function only.

Exam 6: The Muscular System

Rigor mortis generally lasts for

A short-lived contraction of the cells in a motor unit is known as a

Myotonic muscular dystrophy generally affects

The biceps muscle extends from the shoulder to the lower arm and raises the lower arm. The ____ is on the lower arm.

The body contains approximately ____ muscles.

The human biceps and triceps muscles may be described best as working

A steady, low-level contraction of a muscle is referred to as

Small extensions of the muscle cell's plasma membrane that connect with myofibrils are called

Tissue-building steroids are known as

The most common disorders of skeletal muscles are

A strap of dense connective tissue that connects muscle to bone is (a)

Red muscle appears that way due to the presence of

At about what age does the tension, or physical force, a person's muscles can muster begin to decrease?

For maximum effect, one should

What results when muscles use more ATP than respiration can deliver?

Tendon sheaths are used to

A painful muscle spasm that doesn't immediately release is a(n)

In their action, muscles would be most like

Reciprocal innervation of reflexes between antagonistic muscle pairs

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

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