Question 1

A condition in which bones become less dense is:

Accepted Answer

A)  Gigantism
B)  Acromegaly
C)  Osteoarthritis
D)  Rheumatoid arthritis
E)  OsteoporosisF) A) and B)
G) C) and D)

Question 2

What do the researchers propose as the selective advantage for a smaller temporalis muscle?

Accepted Answer

A)  Humans could eat softer foods
B)  The brain could become larger
C)  It would take less energy to move the muscle
D)  It would enable speech
E)  It forced humans to develop tools to cook their foodF) A) and E)
G) B) and E)

Question 3

The molecule that rapidly replenishes ATP at the beginning of muscle activity is:

Accepted Answer

A)  Actin
B)  Creatine phosphate
C)  Dystrophin
D)  Acetylcholine
E)  MyosinF) C) and D)
G) B) and D)

Question 4

Which of the following causes a muscle cell to contract?

Accepted Answer

A)  Actin and myosin break down
B)  The bending of actin heads attached to myosin
C)  Calcium ions form a bridge binding actin to myosin
D)  ATP forms a bridge binding actin to myosin
E)  The bending of myosin heads attached to actinF) B) and D)
G) None of the above

Question 5

After death,muscles remain in a stiff position for several hours.This stiff position is called:

Accepted Answer

A)  Osteoarthritis
B)  Rheumatoid arthritis
C)  Rigor mortis
D)  Osteoporosis
E)  Flaccid paralysisF) B) and E)
G) B) and D)

Question 6

Blood calcium levels are regulated by hormones secreted from the parathyroid and thyroid.When blood calcium is low which of the following would be stimulated by the parathyroid?

Accepted Answer

A)  Uptake of calcium by bone by osteoblasts
B)  Uptake of calcium by bone by osteoclasts
C)  Release of calcium from bone by osteoblasts
D)  Release of calcium from bone by osteoclasts
E)  Uptake of calcium by bone by chondrocytesF) A) and D)
G) B) and D)

Question 7

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,which of the following must occur?

Accepted Answer

A)  Contract temporalis and masseter and relax platysma
B)  Relax temporalis and masseter and contract platysma
C)  Contract temporalis, masseter, and platysma
D)  Relax temporalis, masseter, and platysma
E)  Contract temporalis and relax platysma and masseterF) B) and D)
G) B) and E)

Question 8

How does an impulse from a motor neuron trigger a muscle cell to contract?

Accepted Answer

A)  Acetylcholine is released from the neuron, triggering calcium release from the muscle cell's endoplasmic reticulum
B)  Acetylcholine is released from the neuron, triggering calcium absorption by the muscle cell's endoplasmic reticulum
C)  Acetylcholine is released from the muscle cell, triggering calcium release from the neuron's endoplasmic reticulum
D)  Acetylcholine is released from the neuron, triggering calcium to enter the muscle cell
E)  Acetylcholine is released from the muscle cell, triggering calcium to enter the neuronF) D) and E)
G) A) and E)

Question 9

A thick filament of muscle is composed primarily of the protein:

Accepted Answer

A)  Pectin
B)  Myoglobin
C)  Hemoglobin
D)  Actin
E)  MyosinF) A) and B)
G) B) and E)

Question 10

An area where two bones meet is called a:

Accepted Answer

A)  Synapse
B)  Joint
C)  Synaptic cleft
D)  Vascular cavity
E)  Olfactory bulbF) A) and D)
G) A) and C)

Question 11

A bedridden person is at risk of which of the following?

Accepted Answer

A)  Rheumatoid arthritis
B)  Osteoarthritis
C)  Osteoporosis
D)  A sprain
E)  AnemiaF) C) and E)
G) A) and B)

Question 12

Which of the following describes the role of myosin in muscle contraction?

Accepted Answer

A)  ATP forms a bridge binding actin to myosin
B)  Actin heads bend when attached to myosin
C)  Calcium ions form a bridge moving actin along myosin
D)  Myosin heads bend when attached to actin
E)  Myosin synthesizes new strands of actin, lengthening the muscleF) A) and D)
G) B) and C)

Question 13

The interaction of both the muscular system and the skeletal system is necessary for animals to run,fly and swim.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is not a part of the axial skeleton?

Accepted Answer

A)  Pelvic girdle
B)  Ribs
C)  Skull
D)  Sternum
E)  Vertebral columnF) A) and E)
G) A) and C)

Question 15

Motor neurons stimulate muscle contraction by releasing acetylcholine at a neuromuscular junction.

Accepted Answer

A) True 
 B)False

Question 16

A disorder of the axial skeleton in which the vertebral column curves to the side is known as:

Accepted Answer

A)  Graves' disease
B)  A ruptured cartilage
C)  Scleroderma
D)  All are correct
E)  ScoliosisF) None of the above
G) All of the above

Question 17

Which of the following is not a bone of the lower limbs?

Accepted Answer

A)  Patella
B)  Femur
C)  Tibia
D)  Fibula
E)  UlnaF) B) and D)
G) A) and D)

Question 18

A sprain is a stretched or torn:

Accepted Answer

A)  Ligament
B)  Tendon
C)  Muscle
D)  Neuron
E)  VeinF) None of the above
G) B) and E)

Question 19

A bedridden person is at risk of which of the following?

Accepted Answer

A)  Atrophy
B)  Muscular dystrophy
C)  A sprain
D)  Tetanus
E)  Rigor mortisF) C) and D)
G) None of the above

Question 20

Which of the following is not a part of the appendicular skeleton?

Accepted Answer

A)  Pelvic girdle
B)  Sternum
C)  Pectoral girdle
D)  Femur
E)  HumerusF) B) and E)
G) A) and C)

Exam 28: The Musculoskeletal System

After death,muscles remain in a stiff position for several hours.This stiff position is called:

Correct AnswerverifiedShow Answer

Which of the following is not a part of the axial skeleton?

Correct AnswerverifiedShow Answer

Which of the following causes a muscle cell to contract?

Correct AnswerverifiedShow Answer

What do the researchers propose as the selective advantage for a smaller temporalis muscle?

Correct AnswerverifiedShow Answer

The interaction of both the muscular system and the skeletal system is necessary for animals to run,fly and swim.

Correct AnswerverifiedShow Answer

The molecule that rapidly replenishes ATP at the beginning of muscle activity is:

Correct AnswerverifiedShow Answer

Motor neurons stimulate muscle contraction by releasing acetylcholine at a neuromuscular junction.

Correct AnswerverifiedShow Answer

A sprain is a stretched or torn:

Correct AnswerverifiedShow Answer

A thick filament of muscle is composed primarily of the protein:

Correct AnswerverifiedShow Answer

A disorder of the axial skeleton in which the vertebral column curves to the side is known as:

Correct AnswerverifiedShow Answer

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,which of the following must occur?

Correct AnswerverifiedShow Answer

Which of the following is not a bone of the lower limbs?

Correct AnswerverifiedShow Answer

Which of the following describes the role of myosin in muscle contraction?

Correct AnswerverifiedShow Answer

A bedridden person is at risk of which of the following?

Correct AnswerverifiedShow Answer

A condition in which bones become less dense is:

Correct AnswerverifiedShow Answer

Blood calcium levels are regulated by hormones secreted from the parathyroid and thyroid.When blood calcium is low which of the following would be stimulated by the parathyroid?

Correct AnswerverifiedShow Answer

How does an impulse from a motor neuron trigger a muscle cell to contract?

Correct AnswerverifiedShow Answer

A bedridden person is at risk of which of the following?

Correct AnswerverifiedShow Answer

An area where two bones meet is called a:

Correct AnswerverifiedShow Answer

Which of the following is not a part of the appendicular skeleton?

Correct AnswerverifiedShow Answer

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