Question 1

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) A) and B)
F) A) and C)

Question 2

_____ 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) C) and E)
G) A) and D)

Question 3

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) B) and E)
G) All of the above

Question 4

Which one of the following structures is NOT a part of the appendicular skeleton?

Accepted Answer

A)   ribs
B)   fibula
C)   humerus
D)   coxal
E)   radiusF) A) and E)
G) A) and C)

Question 5

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) B) and C)
F) A) and D)

Question 6

Which of the following statements about the skeleton of a clam is NOT true?

Accepted Answer

A)   The skeleton of a clam has two separate shells.
B)   The skeleton of a clam grows with the organism.
C)   The skeleton of a clam is made of calcium carbonate.
D)   The skeleton of a clam is used mainly to allow movement of the organism.
E)   The skeleton of a clam has muscles attached to it from the inside of the body.F) A) and B)
G) A) and C)

Question 7

The pectoral girdle is adapted for great strength, whereas the pelvic girdle is more adapted for flexibility.

Accepted Answer

A) True 
 B)False

Question 8

Which mammalian skeleton provides an advantage in an aquatic environment?

Accepted Answer

A)   A streamlined torpedo-shaped skeleton.
B)   A skeleton that has elongated legs and large flippers.
C)   A skeleton that allows for walking on the tips of their toes across the bottom of the ocean.
D)   All of the answer choices provide an advantage in an aquatic environment.
E)   None of the answer choices provide an advantage in an aquatic environment.F) All of the above
G) B) and D)

Question 9

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) None of the above
F) A) and B)

Question 10

Calcium ions bind to

Accepted Answer

A)   tropomyosin.
B)   troponin.
C)   actin.
D)   myosin.
E)   cross bridges.F) A) and D)
G) A) and E)

Question 11

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) A) and B)
F) B) and C)

Question 12

Which of the following organisms lack a hydrostatic skeleton?

Accepted Answer

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

Question 13

Which of the following is not an advantage of having an endoskeleton?

Accepted Answer

A)   The skeleton grows with the animal.
B)   Endoskeletons can support the weight of a large animal.
C)   Endoskeleton provides protection to the internal organs.
D)   Endoskeletons allow for more flexibility.
E)   It provides protection for the outermost tissue layer of the organism.F) None of the above
G) A) and C)

Question 14

Which of the following statements about the development of bone in humans is NOT true?

Accepted Answer

A)   Bone breakdown and replacement occur throughout life.
B)   A primary ossification center forms in the middle of a long bone.
C)   A secondary ossification center forms at the end of a long bone.
D)   Bones may form within a cartilage model or within a membrane matrix.
E)   A cartilaginous disk remains between the primary and secondary ossification centers until old age.F) B) and E)
G) C) and E)

Question 15

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) C) and D)
F) B) and D)

Question 16

Which of the following bones is (are)  NOT part of the axial skeleton?

Accepted Answer

A)   ribs
B)   skull
C)   sternum
D)   scapula
E)   vertebraeF) C) and E)
G) B) and E)

Question 17

Which of the following statements about skeletons is NOT true?

Accepted Answer

A)   The skeleton of a vertebrate is an endoskeleton.
B)   The skeleton of an arthropod is an exoskeleton.
C)   The skeleton of a clam is an exoskeleton.
D)   All exoskeletons must be shed as the animal grows.
E)   An earthworm has a fluid-filled cavity that acts as a hydrostatic skeleton.F) A) and C)
G) All of the above

Question 18

What are the correct steps of muscle contraction starting with ACh?
A. ACh diffuses across the synaptic cleft
B. The sarcolemma generates an impulse that moves down the T tubules into the sarcoplasmic reticulum
C. ACh binds to receptors in the sarcolemma
D. The sarcomere contraction produces a myofibril contraction
E. Calcium is released causing the sarcomere contraction

Accepted Answer

A)   a - c - b - e - d
B)   a - b - c -e - d
C)   d - a - b - e - c
D)   c - e - d - a - bE) C) and D)
F) B) and C)

Question 19

According to the sliding filament theory of muscle contraction,

Accepted Answer

A)   actin binds ATP and breaks it apart as actin pulls against myosin.
B)   calcium ions are released from myosin as the filaments slide by.
C)   the thick and thin filaments do not change length during this process.
D)   an accordion-like pleat is formed as the myosin and actin interact.
E)   All of the choices are correct.F) C) and D)
G) None of the above

Question 20

Which of these molecules acts as an ATPase, breaking down ATP to perform its function in muscle contraction?

Accepted Answer

A)   actin
B)   myosin
C)   tropomyosin
D)   troponin
E)   calciumF) C) and D)
G) A) and D)

Exam 39: Locomotion and Support Systems

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

Correct Answer
verified

Which of these molecules acts as an ATPase, breaking down ATP to perform its function in muscle contraction?

Correct Answer
verified

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

Correct Answer
verified

Which of the following organisms lack a hydrostatic skeleton?

Correct Answer
verified

The pectoral girdle is adapted for great strength, whereas the pelvic girdle is more adapted for flexibility.

Correct Answer
verified

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

Correct Answer
verified

Which one of the following structures is NOT a part of the appendicular skeleton?

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

According to the sliding filament theory of muscle contraction,

Correct Answer
verified

Which of the following bones is (are) NOT part of the axial skeleton?

Correct Answer
verified

Which mammalian skeleton provides an advantage in an aquatic environment?

Correct Answer
verified

Which of the following statements about the development of bone in humans is NOT true?

Correct Answer
verified

Which of the following is not an advantage of having an endoskeleton?

Correct Answer
verified

Which of the following statements about skeletons is NOT true?

Correct Answer
verified

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

Correct Answer
verified

Calcium ions bind to

Correct Answer
verified

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 Answer
verified

Which of the following statements about the skeleton of a clam is NOT true?

Correct Answer
verified

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

Correct Answer
verified

Exam 39: Locomotion and Support Systems

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

Correct AnswerverifiedShow Answer

Which of these molecules acts as an ATPase, breaking down ATP to perform its function in muscle contraction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following organisms lack a hydrostatic skeleton?

Correct AnswerverifiedShow Answer

The pectoral girdle is adapted for great strength, whereas the pelvic girdle is more adapted for flexibility.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which one of the following structures is NOT a part of the appendicular skeleton?

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

Correct AnswerverifiedShow Answer

According to the sliding filament theory of muscle contraction,

Correct AnswerverifiedShow Answer

Which of the following bones is (are) NOT part of the axial skeleton?

Correct AnswerverifiedShow Answer

Which mammalian skeleton provides an advantage in an aquatic environment?

Correct AnswerverifiedShow Answer

Which of the following statements about the development of bone in humans is NOT true?

Correct AnswerverifiedShow Answer

Which of the following is not an advantage of having an endoskeleton?

Correct AnswerverifiedShow Answer

Which of the following statements about skeletons is NOT true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Calcium ions bind to

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 skeleton of a clam is NOT true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified