Question 1

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

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Question 4

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) C) and D)
G) B) and D)

Question 5

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 6

A sprain is a stretched or torn:

Accepted Answer

A)  Ligament
B)  Tendon
C)  Muscle
D)  Neuron
E)  VeinF) A) and B)
G) A) and C)

Question 7

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) A) and D)
G) A) and E)

Question 8

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 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 C)
G) B) and D)

Question 10

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 C)
G) C) and D)

Question 11

A condition in which bones become less dense is:

Accepted Answer

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

Question 12

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) B) and E)
G) None of the above

Question 13

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

Question 14

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

Question 15

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) All of the above
G) None of the above

Question 16

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

Question 17

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) A) and E)
G) D) and E)

Question 18

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 E)
G) A) and D)

Question 19

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 B)
G) A) and C)

Question 20

An area where two bones meet is called a:

Accepted Answer

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

Exam 28: The Musculoskeletal System

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

A condition in which bones become less dense is:

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

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

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

An area where two bones meet is called a:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A sprain is a stretched or torn:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Which of the following causes a muscle cell to contract?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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