Question 1

The neurotransmitter released from the nerve terminus at the neuromuscular junction is ___________.

Accepted Answer

A) troponin 
B) Ca2+ 
C) tropomyosin 
D) acetylcholine 
A) troponin 
B) Ca2+ 
C) tropomyosin 
D) acetylcholine D

Question 2

Which of the following is not true about vertebrate bone?

Accepted Answer

A) consist of cells and an extracellular matrix containing collagen fibers 
B) contain hydroxyapatite crystals 
C) contain sarcomere units 
D) contain blood vessels 
E) capable of growth and remodeling 
A) consist of cells and an extracellular matrix containing collagen fibers 
B) contain hydroxyapatite crystals 
C) contain sarcomere units 
D) contain blood vessels 
E) capable of growth and remodeling C

Question 3

Which of the following statements relating to skeletal muscle and their functions is not correct?

Accepted Answer

A) Skeletal muscles are attached to bones by ligaments. 
B) The origin of a skeletal muscle remains relatively stationary. 
C) The end of the muscle called the insertion is attached to the bone that moves when the muscle contracts. 
D) Muscles that cause the same action at a joint are referred to as synergists. 
E) Muscles that produce opposing actions are called antagonists. 
A) Skeletal muscles are attached to bones by ligaments. 
B) The origin of a skeletal muscle remains relatively stationary. 
C) The end of the muscle called the insertion is attached to the bone that moves when the muscle contracts. 
D) Muscles that cause the same action at a joint are referred to as synergists. 
E) Muscles that produce opposing actions are called antagonists. A

Question 4

Sarin gas is an acetylcholinesterase inhibitor.What is the likely description of how a person would die if inhaling this poisonous gas?

Accepted Answer

A) convulsion 
B) paralysis of skeletal muscles 
C) suffocation via tetanus of the respiratory muscles 
D) suffocation via paralysis of the respiratory muscles 
A) convulsion 
B) paralysis of skeletal muscles 
C) suffocation via tetanus of the respiratory muscles 
D) suffocation via paralysis of the respiratory muscles

Question 5

Which of the following regarding the Haversian System is false?

Accepted Answer

A) It keeps osteocytes alive. 
B) Haversian canals may contain nerve fibers. 
C) Haversian canals run parallel to the length of long bone. 
D) It contains the marrow cavity. 
A) It keeps osteocytes alive. 
B) Haversian canals may contain nerve fibers. 
C) Haversian canals run parallel to the length of long bone. 
D) It contains the marrow cavity.

Question 6

Human skeleton is a typical vertebrate

Accepted Answer

A) endoskeleton. 
B) exoskeleton. 
C) hydraulic skeleton. 
D) axial skeleton only. 
E) appendicular skeleton only. 
A) endoskeleton. 
B) exoskeleton. 
C) hydraulic skeleton. 
D) axial skeleton only. 
E) appendicular skeleton only.

Question 7

Which of the following is the smallest unit in terms of size?

Accepted Answer

A) fascicle 
B) myofibril 
C) fiber 
D) nuclei 
E) myofilaments 
A) fascicle 
B) myofibril 
C) fiber 
D) nuclei 
E) myofilaments

Question 8

Utilizing more motor units for stronger muscle contractions is called

Accepted Answer

A) fast-twitching. 
B) fatigue. 
C) aerobic capacity. 
D) recruitment. 
E) insertion. 
A) fast-twitching. 
B) fatigue. 
C) aerobic capacity. 
D) recruitment. 
E) insertion.

Question 9

All of the following statements about exoskeletons are correct except

Accepted Answer

A) exoskeletons are made of chitin. 
B) muscles are attached to the exoskeleton. 
C) exoskeletons do not limit growth because they are flexible. 
D) exoskeletons are shed by many arthropods in a process called molting. 
E) chitin is a polysaccharidE. 
A) exoskeletons are made of chitin. 
B) muscles are attached to the exoskeleton. 
C) exoskeletons do not limit growth because they are flexible. 
D) exoskeletons are shed by many arthropods in a process called molting. 
E) chitin is a polysaccharidE.

Question 10

Which of the following animals have bone that contains no osteocytes?

Accepted Answer

A) dog 
B) human 
C) fish 
D) frog 
E) lizard 
A) dog 
B) human 
C) fish 
D) frog 
E) lizard

Question 11

You are investigating the scene of a hit and run where somebody's pet dog was killed.It is a very hot day so the dog's body temperature is unlikely to yield any important information regarding the time of death.The dog's limbs are movable and there is no significant smell of rotting flesh.What is the best guess of the time of death?

Accepted Answer

A) within the last 10 minutes 
B) within the last 2 hours 
C) 3-4 hours ago 
D) 24 hours ago 
A) within the last 10 minutes 
B) within the last 2 hours 
C) 3-4 hours ago 
D) 24 hours ago

Question 12

You witness a demonstration of a martial arts master breaking a large concrete block with his hand.Besides mastering technique,what is another benefit of the repetitive practice of breaking concrete.

Accepted Answer

A) Repetitive stress on the long bones will solidify cartilage. 
B) The haversian canal system will supply more blood and strengthen the bone. 
C) The repetitive stress on the long bones will be remodeled and strengthened. 
D) The marrow cavity will solidify and strengthen the bone. 
A) Repetitive stress on the long bones will solidify cartilage. 
B) The haversian canal system will supply more blood and strengthen the bone. 
C) The repetitive stress on the long bones will be remodeled and strengthened. 
D) The marrow cavity will solidify and strengthen the bone.

Question 13

The structure causing the muscle depolarization to travel deep into the muscle fiber is the _______.

Accepted Answer

A) T tubule 
B) sarcoplasmic reticulum 
C) motor unit 
D) sarcomere 
A) T tubule 
B) sarcoplasmic reticulum 
C) motor unit 
D) sarcomere

Question 14

The use-dependent decrease in the ability of a muscle to generate force is called

Accepted Answer

A) oxygen debt. 
B) fatigue. 
C) tetanus. 
D) hypertrophy. 
A) oxygen debt. 
B) fatigue. 
C) tetanus. 
D) hypertrophy.

Question 15

Trout and eels have to move efficiently through their watery environment.The difference between how a trout and an eel move through water is

Accepted Answer

A) the eel pushes against the water with the posterior portion of its body while the trout uses its entire body for pushing against the water. 
B) the trout pushes against the water with the posterior portion of its body while the eel uses its entire body for pushing against the water. 
C) the eel uses only its dorsal fin while the trout uses it pelvic and dorsal fin for pushing through the water. 
D) the eel alternates from anterior pushing to posterior pushing with its body while the trout uses only its posterior body. 
E) the eel is able to move more efficiently because of its thick slime coating which the trout does not havE. 
A) the eel pushes against the water with the posterior portion of its body while the trout uses its entire body for pushing against the water. 
B) the trout pushes against the water with the posterior portion of its body while the eel uses its entire body for pushing against the water. 
C) the eel uses only its dorsal fin while the trout uses it pelvic and dorsal fin for pushing through the water. 
D) the eel alternates from anterior pushing to posterior pushing with its body while the trout uses only its posterior body. 
E) the eel is able to move more efficiently because of its thick slime coating which the trout does not havE.

Question 16

The muscles that move the eye have a high proportion of fast-twitch fibers and reach maximum tension very fast.These fibers belong to the class of __________ fibers.

Accepted Answer

A) type I 
B) type II 
C) type III 
D) type IV 
E) type V 
A) type I 
B) type II 
C) type III 
D) type IV 
E) type V

Question 17

The mammalian jaw is an example of what kind of moveable joint?

Accepted Answer

A) hinge joint 
B) combination joint 
C) gliding joint 
D) ball-and-socket joint 
A) hinge joint 
B) combination joint 
C) gliding joint 
D) ball-and-socket joint

Question 18

In arthropods,locomotion is accomplished by muscles that work against

Accepted Answer

A) each other. 
B) the exoskeleton. 
C) a hydrostatic skeleton. 
D) mineralized bones. 
E) the pseudocoel. 
A) each other. 
B) the exoskeleton. 
C) a hydrostatic skeleton. 
D) mineralized bones. 
E) the pseudocoel.

Question 19

The chemical released by somatic motor neurons is

Accepted Answer

A) noradrenaline. 
B) adrenaline. 
C) acetylcholine. 
D) sarcocholine. 
E) sarcoadrenalinE. 
A) noradrenaline. 
B) adrenaline. 
C) acetylcholine. 
D) sarcocholine. 
E) sarcoadrenalinE.

Question 20

By weight training,skeletal muscles grow in size.Cells do not increase in number because they do not divide,but increase in size by a process called

Accepted Answer

A) hypertrophy. 
B) tetanus. 
C) oxygen debt. 
D) summation. 
E) isometry. 
A) hypertrophy. 
B) tetanus. 
C) oxygen debt. 
D) summation. 
E) isometry.

Exam 47: The Musculoskeletal System

The neurotransmitter released from the nerve terminus at the neuromuscular junction is ___________.

Which of the following is not true about vertebrate bone?

Which of the following statements relating to skeletal muscle and their functions is not correct?

Sarin gas is an acetylcholinesterase inhibitor.What is the likely description of how a person would die if inhaling this poisonous gas?

Which of the following regarding the Haversian System is false?

Human skeleton is a typical vertebrate

Which of the following is the smallest unit in terms of size?

Utilizing more motor units for stronger muscle contractions is called

All of the following statements about exoskeletons are correct except

Which of the following animals have bone that contains no osteocytes?

You witness a demonstration of a martial arts master breaking a large concrete block with his hand.Besides mastering technique,what is another benefit of the repetitive practice of breaking concrete.

The structure causing the muscle depolarization to travel deep into the muscle fiber is the _______.

The use-dependent decrease in the ability of a muscle to generate force is called

Trout and eels have to move efficiently through their watery environment.The difference between how a trout and an eel move through water is

The muscles that move the eye have a high proportion of fast-twitch fibers and reach maximum tension very fast.These fibers belong to the class of __________ fibers.

The mammalian jaw is an example of what kind of moveable joint?

In arthropods,locomotion is accomplished by muscles that work against

The chemical released by somatic motor neurons is

By weight training,skeletal muscles grow in size.Cells do not increase in number because they do not divide,but increase in size by a process called

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