Question 1

After death,muscles remain in a stiff position for several hours because ATP is required

Accepted Answer

A)   to break the bond between actin and myosin.
B)   for actin to bind to myosin.
C)   for the motor neuron to signal a muscle to relax.
D)   for calcium ions to be pumped into the muscle cell.
E)   to produce creatine phosphate.F) A) and B)
G) A) and C)

Question 2

The vertebrae in descending order from the skull are

Accepted Answer

A)   cervical, thoracic, lumbar.
B)   lumbar, thoracic, cervical.
C)   cervical, lumbar, thoracic.
D)   thoracic, lumbar, cervical.
E)   lumbar, cervical, thoracic.F) B) and E)
G) B) and D) A

Question 3

Which is not a bone of the lower limbs?

Accepted Answer

A)   patella
B)   femur
C)   tibia
D)   fibula
E)   ulnaF) A) and E)
G) None of the above

Question 4

If you were examining a biopsy sample of a leg bone,and the structure of the bone was spongy,you would know that the sample came from the end of the bone.

Accepted Answer

A) True 
 B)False

Question 5

The breast muscles of a wild duck are dark,while that of a domesticated chicken are white.The breast muscles in a domesticated chicken are

Accepted Answer

A)   fast-twitch muscles with few capillaries or mitochondria.
B)   slow-twitch muscles with abundant capillaries and mitochondria.
C)   slow-twitch muscles with few capillaries or mitochondria.
D)   fast-twitch muscles with abundant capillaries and mitochondria.
E)   a mix of fast-twitch and slow-twitch muscles.F) A) and E)
G) A) and C)

Question 6

Which bone,if examined,would show that you were working with something other than an upper limb?

Accepted Answer

A)   radius
B)   ulna
C)   patella
D)   humerus
E)   clavicleF) D) and E)
G) A) and C)

Question 7

Muscle rich in slow-twitch fibers is darker than muscle rich in fast-twitch fibers.

Accepted Answer

A) True 
 B)False

Question 8

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease.
-Which will be true of the muscles of a bedridden person?

Accepted Answer

A)   Only calcium levels will be lower than normal.
B)   Mitochondrial enzyme activity will be lower than normal.
C)   Only ATP production will be lower than normal.
D)   Calcium levels and ATP production will be lower than normal.
E)   ATP production and mitochondrial enzyme activity will be lower than normal.F) A) and E)
G) A) and D)

Question 9

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,you

Accepted Answer

A)   contract the temporalis and masseter and relax the platysma.
B)   relax the temporalis and masseter and contract the platysma.
C)   contract the temporalis, masseter, and platysma.
D)   relax the temporalis, masseter, and platysma.
E)   contract the temporalis and relax the platysma and masseter.F) C) and D)
G) A) and E)

Question 10

Athletes who do more short bursts of intense activity will develop more fast-twitch muscle.

Accepted Answer

A) True 
 B)False

Question 11

The precursor of bone is cartilage.

Accepted Answer

A) True 
 B)False

Question 12

The DNA sequences for a portion of the myosin gene are shown for humans and several non-human primates. The fragments start at nucleotide #26 in the gene, and shaded boxes highlight differences between the two sets of sequences.
 
-What does the high level of similarity between the myosin gene sequences in human and non-human primates suggest?

Accepted Answer

A)   Humans and non-human primates had a common ancestor at some time in the past.
B)   Humans and non-human primates are not related.
C)   The myosin gene arose independently in humans and non-human primates.
D)   Genes can transfer readily between humans and non-human primates.
E)   Natural selection did not occur in humans.F) A) and B)
G) C) and D)

Question 13

The type of skeleton that consists of fluid constrained within a layer of flexible tissue is a(n)

Accepted Answer

A)   vascular canal.
B)   endoskeleton.
C)   gastrovascular cavity.
D)   exoskeleton.
E)   hydrostatic skeleton.F) C) and E)
G) A) and B)

Question 14

What causes a muscle cell to contract?

Accepted Answer

A)   Actin and myosin break down.
B)   Actin heads attached to myosin bend.
C)   Calcium ions form a bridge binding actin to myosin.
D)   ATP forms a bridge binding actin to myosin.
E)   Myosin heads attached to actin bend.F) A) and D)
G) A) and B)

Question 15

A new drug that mimics ATP but that cannot be broken down as ATP is in muscle would still allow muscular contraction to occur.

Accepted Answer

A) True 
 B)False  False

Question 16

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease.
-A bedridden person is at risk of what problem?

Accepted Answer

A)   rheumatoid arthritis
B)   osteoarthritis
C)   osteoporosis
D)   a sprain
E)   anemiaF) C) and E)
G) A) and B) C

Question 17

If you placed an electrode on a person's triceps and stimulated the muscle,they would not be able to

Accepted Answer

A)   straighten their leg.
B)   straighten their arm.
C)   bend their leg.
D)   bend their arm.
E)   No answer is correct.F) A) and B)
G) C) and D)

Question 18

How did the inactivation of a gene that now encodes a nonfunctional myosin protein affect human chewing muscles?

Accepted Answer

A)   No effect because humans have over 40 closely related myosin genes.
B)   No effect because myosin is not essential for life.
C)   The loss of this myosin led to smaller and weaker chewing muscles in humans.
D)   No effect because other proteins in the body can do the same thing as myosin.
E)   The loss of this myosin led to greater flexibility of chewing muscles in humans.F) A) and C)
G) None of the above

Question 19

Skeletal muscle contraction is important in maintaining body temperature homeostasis.

Accepted Answer

A) True 
 B)False

Question 20

A sprain is a stretched or torn

Accepted Answer

A)   ligament.
B)   tendon.
C)   muscle.
D)   neuron.
E)   vein.F) B) and C)
G) All of the above

Exam 26: The Skeletal and Muscular Systems

After death,muscles remain in a stiff position for several hours because ATP is required

Correct Answer
verified

The vertebrae in descending order from the skull are

Correct Answer
verified
A

Which is not a bone of the lower limbs?

Correct Answer
verified

If you were examining a biopsy sample of a leg bone,and the structure of the bone was spongy,you would know that the sample came from the end of the bone.

Correct Answer
verified

The breast muscles of a wild duck are dark,while that of a domesticated chicken are white.The breast muscles in a domesticated chicken are

Correct Answer
verified

Which bone,if examined,would show that you were working with something other than an upper limb?

Correct Answer
verified

Muscle rich in slow-twitch fibers is darker than muscle rich in fast-twitch fibers.

Correct Answer
verified

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -Which will be true of the muscles of a bedridden person?

Correct Answer
verified

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,you

Correct Answer
verified

Athletes who do more short bursts of intense activity will develop more fast-twitch muscle.

Correct Answer
verified

The precursor of bone is cartilage.

Correct Answer
verified

Correct Answer
verified

The type of skeleton that consists of fluid constrained within a layer of flexible tissue is a(n)

Correct Answer
verified

What causes a muscle cell to contract?

Correct Answer
verified

A new drug that mimics ATP but that cannot be broken down as ATP is in muscle would still allow muscular contraction to occur.

Correct Answer
verified
False

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -A bedridden person is at risk of what problem?

Correct Answer
verified
C

If you placed an electrode on a person's triceps and stimulated the muscle,they would not be able to

Correct Answer
verified

How did the inactivation of a gene that now encodes a nonfunctional myosin protein affect human chewing muscles?

Correct Answer
verified

Skeletal muscle contraction is important in maintaining body temperature homeostasis.

Correct Answer
verified

A sprain is a stretched or torn

Correct Answer
verified

Exam 26: The Skeletal and Muscular Systems

After death,muscles remain in a stiff position for several hours because ATP is required

Correct AnswerverifiedShow Answer

The vertebrae in descending order from the skull are

Correct AnswerverifiedA

Which is not a bone of the lower limbs?

Correct AnswerverifiedShow Answer

If you were examining a biopsy sample of a leg bone,and the structure of the bone was spongy,you would know that the sample came from the end of the bone.

Correct AnswerverifiedShow Answer

The breast muscles of a wild duck are dark,while that of a domesticated chicken are white.The breast muscles in a domesticated chicken are

Correct AnswerverifiedShow Answer

Which bone,if examined,would show that you were working with something other than an upper limb?

Correct AnswerverifiedShow Answer

Muscle rich in slow-twitch fibers is darker than muscle rich in fast-twitch fibers.

Correct AnswerverifiedShow Answer

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -Which will be true of the muscles of a bedridden person?

Correct AnswerverifiedShow Answer

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,you

Correct AnswerverifiedShow Answer

Athletes who do more short bursts of intense activity will develop more fast-twitch muscle.

Correct AnswerverifiedShow Answer

The precursor of bone is cartilage.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The type of skeleton that consists of fluid constrained within a layer of flexible tissue is a(n)

Correct AnswerverifiedShow Answer

What causes a muscle cell to contract?

Correct AnswerverifiedShow Answer

A new drug that mimics ATP but that cannot be broken down as ATP is in muscle would still allow muscular contraction to occur.

Correct AnswerverifiedFalse

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -A bedridden person is at risk of what problem?

Correct AnswerverifiedC

If you placed an electrode on a person's triceps and stimulated the muscle,they would not be able to

Correct AnswerverifiedShow Answer

How did the inactivation of a gene that now encodes a nonfunctional myosin protein affect human chewing muscles?

Correct AnswerverifiedShow Answer

Skeletal muscle contraction is important in maintaining body temperature homeostasis.

Correct AnswerverifiedShow Answer

A sprain is a stretched or torn

Correct AnswerverifiedShow Answer

Correct Answer
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A

Correct Answer
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False

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C

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