Question 1

The sarcoplasmic reticulum releases calcium ions when stimulated directly by the

Accepted Answer

A)  sarcolemma.
B)  neuromuscular junction.
C)  tropomyosin.
D)  axon bulb.
E)  T tubule.F) A) and B)
G) A) and C)

Question 2

Actin and myosin filaments are both present in the dense region called the

Accepted Answer

A)  A band.
B)  Z line.
C)  H zone.
D)  I band.
E)  M band.F) B) and D)
G) A) and D)

Question 3

When a person straightens their arm out they are flexing the triceps brachii.During this movement the triceps is referred to as the _________.

Accepted Answer

A)  agonist
B)  antagonist
C)  tendon
D)  all of the above
E)  none of the aboveF) B) and E)
G) All of the above

Question 4

If Ca+ is restricted to a muscle cell,what are the potential consequences?

Accepted Answer

A)  The myosin head would not be able to bind to the actin filament.
B)  The myosin filament would not slide past the actin filament causing a contraction.
C)  ATP is not split causing the release of energy.
D)  All of these are potential consequences.
E)  None of these are potential consequences.F) All of the above
G) A) and C)

Question 5

_____ are bone-absorbing cells and _____ are bone forming cells.

Accepted Answer

A)  Menisci; osteroclasts
B)  Chondrocytes; lymphocytes
C)  Osteoclasts; osteoblasts
D)  Eosinophils; red blood cells
E)  Osteocytes; osteonsF) A) and D)
G) A) and E)

Question 6

Which of the following lists the correct order of vertebral regions from superior to inferior?

Accepted Answer

A)  thoracic-lumbar-sacrum-cervical-coccyx
B)  cervical-lumbar-sacrum-thoracic-coccyx
C)  cervical-thoracic-lumbar-sacrum-coccyx
D)  lumbar-sacrum-cervical-thoracic-coccyx
E)  sacrum-cervical-thoracic-lumbar-coccyxF) A) and C)
G) None of the above

Question 7

What is the correct order that a motor nerve impulse travels when triggering a muscle contraction?

Accepted Answer

A)  motor nerve-synaptic cleft-sarcolemma-sarcoplasmic reticulum-troponin
B)  motor nerve-synaptic cleft-sarcolemma-troponin-sarcoplasmic reticulum
C)  motor nerve-sarcoplasmic reticulum-synaptic cleft-sarcolemma-troponin
D)  motor nerve-sarcolemma-sarcoplasmic reticulum-synaptic cleft-troponin
E)  motor nerve-sarcolemma-synaptic cleft-sarcoplasmic reticulum-troponinF) C) and D)
G) A) and D)

Question 8

The elbow and knee are examples of ______ joints.

Accepted Answer

A)  immovable
B)  fibrous
C)  cartilaginous
D)  synovial
E)  ball-and-socketF) A) and B)
G) B) and E)

Question 9

Which of the following statements about the insect exoskeleton is NOT true?

Accepted Answer

A)  The exoskeleton protects insects against predators and drying out.
B)  The insect exoskeleton is jointed and movable.
C)  The insect exoskeleton grows with the organism.
D)  The insect exoskeleton is made of a complex form of carbohydrate called chitin.
E)  The insect exoskeleton has muscles attached to it from the inside of the body.F) B) and E)
G) A) and B)

Question 10

Which of the following associations of term and description is NOT correct?

Accepted Answer

A)  actin - thin filament
B)  myosin - thick filament
C)  sarcomere - the entire muscle cell or muscle fiber
D)  sarcolemma - extensive plasma membraneE) All of the above
F) C) and D)

Question 11

One of the major functions of the skeletal system is to store long term sources of energy for the body.

Accepted Answer

A) True 
 B)False

Question 12

Which muscle list of structures is correctly organized from large to small?

Accepted Answer

A)  muscle,muscle cell,myofibril,sarcomeres,filaments
B)  muscle,muscle fibers,sarcomeres,filaments,myofibrils
C)  muscle,sarcolemma,myofibrils,actin filaments,myosin filaments
D)  muscle cells,myofibrils,filaments,sarcoplasmE) A) and D)
F) B) and D)

Question 13

___ will take calcium from the blood,whereas ___ will deposit calcium into the blood.

Accepted Answer

A)  Osteoclasts; osteoblasts
B)  Osteocytes; osteoclasts
C)  Osteocytes; osteoblasts
D)  Osteoblasts,osteocytes
E)  Osteoblasts; osteoclastsF) A) and E)
G) A) and D)

Question 14

Which of the following associations of bone structures and functions is not correct?

Accepted Answer

A)  osteoblasts - cells that build bone tissue
B)  osteoclasts - cells that break down bone tissue
C)  osteons - tubular units of compact bone
D)  red bone marrow - fat-storage tissue
E)  lacunae - tiny chambers in concentric circles around a central canalF) B) and D)
G) All of the above

Question 15

The system of flexing and extending muscles makes movement of appendages easy to understand.But how are some actions possible (sticking out your tongue,beating of your heart) when these structures have no bone structure with opposing flexors and extensors in them?

Accepted Answer

A)  One set of muscle cells must therefore be able to both contract and expand.
B)  These structures must be empty chambers,and fluids forced into them expand them.
C)  Since muscle cells can only contract and relax,muscle cells running diagonally or crosswise amidst the longitudinal muscles must contract and force the long relaxed muscle cells to elongate.
D)  This cannot be explained at present.E) None of the above
F) C) and D)

Question 16

Which of the following organisms lack a hydrostatic skeleton?

Accepted Answer

A)  cicada
B)  planarian
C)  hydra
D)  earthworms
E)  roundwormsF) B) and D)
G) B) and C)

Question 17

If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?

Accepted Answer

A)  Tropomyosin will not be pulled away from the myosin binding sites.
B)  Myosin heads will not bind to the actin filament.
C)  The power stroke will not be produced preventing the actin filament from moving.
D)  All of these are complications resulting from a lack of calcium.E) B) and C)
F) A) and D)

Question 18

The alternation of circular muscle contraction and longitudinal muscle contraction allows the earthworm to move forward.What type of support system aids locomotion in the earthworm?

Accepted Answer

A)  an exoskeleton
B)  an endoskeleton
C)  a calcium carbonate shell
D)  a hydrostatic skeletonE) B) and D)
F) A) and D)

Question 19

Which of the following groups of organisms will all possess hydrostatic skeletons?

Accepted Answer

A)  planaria,hydras and earthworms
B)  planaria,hyrdas,crayfish
C)  earthworms,crayfish and sea stars
D)  butterflies,cats and clams
E)  bluegill,lobster and planariaF) B) and D)
G) A) and B)

Question 20

Which of the following hormones stimulate osteoblasts to form bone?

Accepted Answer

A)  erythropoietin
B)  parathyroid hormone
C)  growth hormone
D)  sex hormones
E)  Both growth and sex hormonesF) D) and E)
G) B) and E)

Exam 39: Locomotion and Support Systems

If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?

Correct AnswerverifiedShow Answer

The elbow and knee are examples of ______ joints.

Correct AnswerverifiedShow Answer

If Ca+ is restricted to a muscle cell,what are the potential consequences?

Correct AnswerverifiedShow Answer

___ will take calcium from the blood,whereas ___ will deposit calcium into the blood.

Correct AnswerverifiedShow Answer

The alternation of circular muscle contraction and longitudinal muscle contraction allows the earthworm to move forward.What type of support system aids locomotion in the earthworm?

Correct AnswerverifiedShow Answer

Actin and myosin filaments are both present in the dense region called the

Correct AnswerverifiedShow Answer

Which of the following organisms lack a hydrostatic skeleton?

Correct AnswerverifiedShow Answer

Which of the following lists the correct order of vertebral regions from superior to inferior?

Correct AnswerverifiedShow Answer

One of the major functions of the skeletal system is to store long term sources of energy for the body.

Correct AnswerverifiedShow Answer

Which of the following groups of organisms will all possess hydrostatic skeletons?

Correct AnswerverifiedShow Answer

What is the correct order that a motor nerve impulse travels when triggering a muscle contraction?

Correct AnswerverifiedShow Answer

When a person straightens their arm out they are flexing the triceps brachii.During this movement the triceps is referred to as the _________.

Correct AnswerverifiedShow Answer

Which of the following associations of bone structures and functions is not correct?

Correct AnswerverifiedShow Answer

Which muscle list of structures is correctly organized from large to small?

Correct AnswerverifiedShow Answer

The system of flexing and extending muscles makes movement of appendages easy to understand.But how are some actions possible (sticking out your tongue,beating of your heart) when these structures have no bone structure with opposing flexors and extensors in them?

Correct AnswerverifiedShow Answer

Which of the following statements about the insect exoskeleton is NOT true?

Correct AnswerverifiedShow Answer

The sarcoplasmic reticulum releases calcium ions when stimulated directly by the

Correct AnswerverifiedShow Answer

_____ are bone-absorbing cells and _____ are bone forming cells.

Correct AnswerverifiedShow Answer

Which of the following associations of term and description is NOT correct?

Correct AnswerverifiedShow Answer

Which of the following hormones stimulate osteoblasts to form bone?

Correct AnswerverifiedShow Answer

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If Ca⁺ is restricted to a muscle cell,what are the potential consequences?

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_ will take calcium from the blood,whereas _ will deposit calcium into the blood.

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_ are bone-absorbing cells and _ are bone forming cells.

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