Question 1

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) A) and B)
G) A) and C)

Question 2

Identify and briefly describe the labeled structures of the long bone in this picture.  A: ________
B: ________
C: ________
D: ________
E: ________
F: ________
G: ________

Accepted Answer

A: hyaline cartilage: found at the artic...

Question 3

The radius is to the ulna as the

Accepted Answer

A)  tibia is to the femur.
B)  fibula is to the ulna.
C)  fibula is to the tibia.
D)  humerus is to the femur.E) All of the above
F) A) and D)

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) A) and B)
G) A) and C)

Question 5

In muscle innervation motor nerve fibers signal muscle movement from the region called the neuromuscular junction.

Accepted Answer

A) True 
 B)False

Question 6

________ 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) B) and D)
G) None of the above

Question 7

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) B) and E)
G) B) and D)

Question 8

Muscle contraction is triggered

Accepted Answer

A)  when high levels of oxygen and sugar are released by the sarcolemma.
B)  when a surplus of ATP is released by a nerve motor unit.
C)  by release of a neurotransmitter at a synapse that directly causes actin and myosin to slide.
D)  by the nerve releasing a neurotransmitter,which triggers a flow of calcium that attaches to actin filaments and exposes the myosin binding sites.
E)  by the nerve releasing a neurotransmitter,which triggers a flow of calcium that releases ATP and begins the actin filaments sliding across the myosin binding sites.F) A) and C)
G) A) and E)

Question 9

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) A) and B)
G) C) and E)

Question 10

Explain the difference between the functions of the osteoblasts and osteocytes?

Accepted Answer

Osteoblasts are known as the bone formin...

Question 11

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 C)
G) B) and E)

Question 12

Which feature of the mammalian skeleton provides an advantage for animals that are land-based predators?

Accepted Answer

A)  Walking on their toes.
B)  Elongated hindlimbs that propel them forward.
C)  Bipedal locomotion on the soles of the feet.
D)  Long legs and running on the tips of elongated phalanges.
E)  All of these are advantages for land-based predators.F) A) and E)
G) A) and D)

Question 13

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) None of the above
G) A) and D)

Question 14

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) A) and B)
G) A) and C)

Question 15

Calcium ions bind to

Accepted Answer

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

Exam 39: Locomotion and Support Systems

The sarcoplasmic reticulum releases calcium ions when stimulated directly by the

Correct Answer
verified

Muscle contraction is triggered

Correct Answer
verified

Which mammalian skeleton provides an advantage in an aquatic environment?

Correct Answer
verified

Calcium ions bind to

Correct Answer
verified

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

Correct Answer
verified

In muscle innervation motor nerve fibers signal muscle movement from the region called the neuromuscular junction.

Correct Answer
verified

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

Correct Answer
verified

Which feature of the mammalian skeleton provides an advantage for animals that are land-based predators?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

The radius is to the ulna as the

Correct Answer
verified

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

Correct Answer
verified

Identify and briefly describe the labeled structures of the long bone in this picture. A: B: C: D: E: F: G:

Correct Answer
verified
A: hyaline cartilage: found at the artic...
View Answer

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

Correct Answer
verified

Explain the difference between the functions of the osteoblasts and osteocytes?

Correct Answer
verified
Osteoblasts are known as the bone formin...
View Answer

Exam 39: Locomotion and Support Systems

The sarcoplasmic reticulum releases calcium ions when stimulated directly by the

Correct AnswerverifiedShow Answer

Muscle contraction is triggered

Correct AnswerverifiedShow Answer

Which mammalian skeleton provides an advantage in an aquatic environment?

Correct AnswerverifiedShow Answer

Calcium ions bind to

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In muscle innervation motor nerve fibers signal muscle movement from the region called the neuromuscular junction.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which feature of the mammalian skeleton provides an advantage for animals that are land-based predators?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The radius is to the ulna as the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Identify and briefly describe the labeled structures of the long bone in this picture. A: ________ B: ________ C: ________ D: ________ E: ________ F: ________ G: ________

Correct AnswerverifiedA: hyaline cartilage: found at the artic...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Explain the difference between the functions of the osteoblasts and osteocytes?

Correct AnswerverifiedOsteoblasts are known as the bone formin...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Identify and briefly describe the labeled structures of the long bone in this picture. A: B: C: D: E: F: G:

Correct Answer
verified
A: hyaline cartilage: found at the artic...
View Answer

Correct Answer
verified

Correct Answer
verified
Osteoblasts are known as the bone formin...
View Answer