Question 1

Each myofibril consists of two types of filaments,a thick actin filament and a thin myosin filament.

Accepted Answer

A) True 
 B)False

Question 2

If you applied a drug which could prevent action potentials to a muscle cell,what would be the result when a motor neuron fired?

Accepted Answer

A)   no contraction since that requires an action potential
B)   normal contraction
C)   release of calcium outside the muscle cell
D)   a graded potential in the neuron
E)   None of the answer choices are correct.F) D) and E)
G) A) and B)

Question 3

Exercise leads to weaker muscles due to the repeated strain,which damages the muscle.

Accepted Answer

A) True 
 B)False

Question 4

The hormone that helps remove calcium from the blood and stores it in bone is

Accepted Answer

A)   calcitonin.
B)   prolactin.
C)   parathyroid hormone (PTH) .
D)   insulin.
E)   glucagon.F) A) and B)
G) All of the above

Question 5

A motor neuron stimulates how much muscular tissue?

Accepted Answer

A)   one muscle fiber
B)   several muscle fibers
C)   an entire muscle
D)   one sarcomere
E)   several musclesF) All of the above
G) A) and E)

Question 6

The breast muscle of a wild duck is dark,while that of a domesticated chicken is white.What would be true of breast muscle in a wild duck?

Accepted Answer

A)   predominately fast-twitch muscles with abundant capillaries and mitochondria
B)   predominately fast-twitch muscles with few capillaries or mitochondria
C)   predominately slow-twitch muscles with abundant capillaries and mitochondria
D)   predominately slow-twitch muscles with few capillaries or mitochondria
E)   None of the answer choices is correct.F) B) and C)
G) A) and B) C

Question 7

In muscle tissue,if there is not enough oxygen for aerobic respiration to occur,the muscle cell

Accepted Answer

A)   can produce ATP by fermentation.
B)   cannot make ATP.
C)   uses creatine phosphate instead of ATP for energy.
D)   can produce ATP from fats.
E)   depletes its reserves of lactic acid.F) B) and C)
G) B) and D) A

Question 8

When it is needed by the rest of the body,bone can provide calcium.

Accepted Answer

A) True 
 B)False

Question 9

Which part would be excluded from a diagram of the appendicular skeleton?

Accepted Answer

A)   pelvic girdle
B)   sternum
C)   pectoral girdle
D)   femur
E)   humerusF) B) and E)
G) A) and E)

Question 10

A slow-twitch muscle fiber

Accepted Answer

A)   uses ATP quickly in short, fast contractions.
B)   has many capillaries.
C)   is low in myoglobin content.
D)   works aerobically.
E)   All of the answer choices are correct.F) C) and D)
G) A) and B)

Question 11

Which is a bone of the lower limbs?

Accepted Answer

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

Question 12

The basic job of skeletal muscle is to pump blood through the body.

Accepted Answer

A) True 
 B)False

Question 13

The membrane of a muscle cell makes a deeply indented set of B tubules where a motor neuron contacts it.

Accepted Answer

A) True 
 B)False

Question 14

One of the critical functions of the vertebrate skeleton is helping to generate movement,along with the muscular system.

Accepted Answer

A) True 
 B)False

Question 15

If you found a mutation,involving the loss of two bases,which was present in humans living on all four continents which you could test but was absent in close relatives such as gorillas and chimps,what would this imply?

Accepted Answer

A)   Two bases were actually insertions in the nonhuman primates.
B)   Deletion arose before the branch between humans and nonhuman primates.
C)   Deletion arose multiple nonhuman primates.
D)   Deletion arose at least six times in different human populations.
E)   Deletion arose after the branch between humans and nonhuman primates.F) C) and D)
G) D) and E)

Question 16

If you were asked to clean up some boxes of bones after a lab,which would you remove from a box marked "Lower Limbs"?

Accepted Answer

A)   patella
B)   femur
C)   tibia
D)   fibula
E)   ulnaF) B) and D)
G) D) and E)

Question 17

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

Question 18

ADP is required for muscular contraction.

Accepted Answer

A) True 
 B)False

Question 19

Which function applies in vertebrates to an element other than calcium?

Accepted Answer

A)   blood clotting
B)   muscle contraction
C)   transport of oxygen to the body's cells
D)   cell membrane permeability
E)   strengthening of boneF) B) and E)
G) A) and B)

Question 20

Which would be excluded from a list of the parts of the axial skeleton?

Accepted Answer

A)   pelvic girdle
B)   ribs
C)   skull
D)   sternum
E)   vertebral columnF) B) and E)
G) B) and D) A

Exam 29: The Skeletal and Muscular Systems

Each myofibril consists of two types of filaments,a thick actin filament and a thin myosin filament.

Correct AnswerverifiedShow Answer

If you applied a drug which could prevent action potentials to a muscle cell,what would be the result when a motor neuron fired?

Correct AnswerverifiedShow Answer

Exercise leads to weaker muscles due to the repeated strain,which damages the muscle.

Correct AnswerverifiedShow Answer

The hormone that helps remove calcium from the blood and stores it in bone is

Correct AnswerverifiedShow Answer

A motor neuron stimulates how much muscular tissue?

Correct AnswerverifiedShow Answer

The breast muscle of a wild duck is dark,while that of a domesticated chicken is white.What would be true of breast muscle in a wild duck?

Correct AnswerverifiedC

In muscle tissue,if there is not enough oxygen for aerobic respiration to occur,the muscle cell

Correct AnswerverifiedA

When it is needed by the rest of the body,bone can provide calcium.

Correct AnswerverifiedShow Answer

Which part would be excluded from a diagram of the appendicular skeleton?

Correct AnswerverifiedShow Answer

A slow-twitch muscle fiber

Correct AnswerverifiedShow Answer

Which is a bone of the lower limbs?

Correct AnswerverifiedShow Answer

The basic job of skeletal muscle is to pump blood through the body.

Correct AnswerverifiedShow Answer

The membrane of a muscle cell makes a deeply indented set of B tubules where a motor neuron contacts it.

Correct AnswerverifiedShow Answer

One of the critical functions of the vertebrate skeleton is helping to generate movement,along with the muscular system.

Correct AnswerverifiedShow Answer

If you found a mutation,involving the loss of two bases,which was present in humans living on all four continents which you could test but was absent in close relatives such as gorillas and chimps,what would this imply?

Correct AnswerverifiedShow Answer

If you were asked to clean up some boxes of bones after a lab,which would you remove from a box marked "Lower Limbs"?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

ADP is required for muscular contraction.

Correct AnswerverifiedShow Answer

Which function applies in vertebrates to an element other than calcium?

Correct AnswerverifiedShow Answer

Which would be excluded from a list of the parts of the axial skeleton?

Correct AnswerverifiedA

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A