Question 1

What is the deltoid muscle shaped like?

Accepted Answer

A)   a long thin line
B)   a square
C)   a triangle
D)   a circle
E)   a trapezoidF) B) and E)
G) A) and E)

Question 2

Which muscle injury is characterized by a twisting of a joint leading to swelling and injury?

Accepted Answer

A)   sprain
B)   strain
C)   tendinitis
D)   bursitis
E)   mylagiaF) B) and C)
G) D) and E)

Question 3

One motor unit obeys a principle called the all-or-none law.

Accepted Answer

A) True 
 B)False

Question 4

Fibromyalgia is a temporary condition of achy muscles, usually due to overuse.

Accepted Answer

A) True 
 B)False

Question 5

In good muscle tone, how many motor units are contracted?

Accepted Answer

A)   none
B)   some
C)   all
D)   5 -10% of the motor units
E)   10 - 15% of the motor unitsF) A) and C)
G) B) and E)

Question 6

Each actin molecule is shaped like a golf club, with a straight portion ending in a globular head.

Accepted Answer

A) True 
 B)False

Question 7

What information does the word rectus give you about a muscle?

Accepted Answer

A)   the size of the muscle fibers
B)   the attachment of the muscle fibers
C)   the action of the muscle fibers
D)   the shape of the muscle fibers
E)   the direction of muscle fibersF) A) and E)
G) None of the above

Question 8

Which of the following injuries is most likely to happen to the ankle?

Accepted Answer

A)   sprain
B)   strain
C)   convulsion
D)   bursitis
E)   muscular dystrophyF) A) and E)
G) B) and E) A

Question 9

What do smooth, cardiac, and skeletal muscle all have in common?

Accepted Answer

A)   They are all uninucleated.
B)   They are all striated.
C)   They are all found in the walls of blood vessels.
D)   The cells of these muscles are all called muscle fibers.
E)   They all interlock at intercalated disks.F) C) and D)
G) D) and E)

Question 10

Of the three pathways for supplying ATP to the muscle, which pathway(s)  do slow-twitch fibers prefer?

Accepted Answer

A)   the creatine phosphate pathway
B)   fermentation
C)   aerobic respiration
D)   the creatine phosphate pathway or fermentation
E)   the creatine phosphate pathway or aerobic respirationF) B) and E)
G) A) and B)

Question 11

Explain the differences between fast-twitch and slow-twitch muscle fibers.

Accepted Answer

Fast-twitch muscle fibers are usually ae...

Question 12

What happens when the arrector pili muscles contract?

Accepted Answer

A)   Your head nods "yes."
B)   Your leg kicks out.
C)   The hairs on your skin stand on end.
D)   The blood from your skin is rerouted to your core.
E)   You tap your finger.F) A) and D)
G) A) and B)

Question 13

Of the three types of muscle tissue, which is voluntary?

Accepted Answer

A)   smooth muscle
B)   cardiac muscle
C)   skeletal muscle
D)   both smooth and skeletal
E)   both cardiac and skeletalF) A) and D)
G) A) and C)

Question 14

Temperature sensitive neurons in the skin are responsible for initiating shivering.

Accepted Answer

A) True 
 B)False

Question 15

What structure attaches a muscle to a bone?

Accepted Answer

A)   ligaments
B)   tendons
C)   bursae
D)   sarcolemma
E)   sarcoplasmF) A) and E)
G) A) and D) B

Question 16

What is the reservoir for Ca2+ in the body?

Accepted Answer

A)   muscles
B)   bones
C)   liver
D)   brain
E)   bloodF) D) and E)
G) A) and E)

Question 17

From the outside of a muscle coming in, the first thing encountered would be

Accepted Answer

A)   fascia.
B)   fascicle.
C)   dense connective tissue.
D)   muscle fiber.
E)   myofibril.F) C) and E)
G) D) and E) A

Question 18

Because the heart beats continuously, cardiac fibers never relax completely.

Accepted Answer

A) True 
 B)False

Question 19

What supplies the energy for muscle contraction?

Accepted Answer

A)   actin
B)   myosin
C)   tropomyosin
D)   ATP
E)   Ca2+F) A) and C)
G) None of the above

Question 20

Muscles can only pull; they cannot push.

Accepted Answer

A) True 
 B)False

Exam 12: Muscular System

What is the deltoid muscle shaped like?

Correct AnswerverifiedShow Answer

Which muscle injury is characterized by a twisting of a joint leading to swelling and injury?

Correct AnswerverifiedShow Answer

One motor unit obeys a principle called the all-or-none law.

Correct AnswerverifiedShow Answer

Fibromyalgia is a temporary condition of achy muscles, usually due to overuse.

Correct AnswerverifiedShow Answer

In good muscle tone, how many motor units are contracted?

Correct AnswerverifiedShow Answer

Each actin molecule is shaped like a golf club, with a straight portion ending in a globular head.

Correct AnswerverifiedShow Answer

What information does the word rectus give you about a muscle?

Correct AnswerverifiedShow Answer

Which of the following injuries is most likely to happen to the ankle?

Correct AnswerverifiedA

What do smooth, cardiac, and skeletal muscle all have in common?

Correct AnswerverifiedShow Answer

Of the three pathways for supplying ATP to the muscle, which pathway(s) do slow-twitch fibers prefer?

Correct AnswerverifiedShow Answer

Explain the differences between fast-twitch and slow-twitch muscle fibers.

Correct AnswerverifiedFast-twitch muscle fibers are usually ae...View AnswerShow Answer

What happens when the arrector pili muscles contract?

Correct AnswerverifiedShow Answer

Of the three types of muscle tissue, which is voluntary?

Correct AnswerverifiedShow Answer

Temperature sensitive neurons in the skin are responsible for initiating shivering.

Correct AnswerverifiedShow Answer

What structure attaches a muscle to a bone?

Correct AnswerverifiedB

What is the reservoir for Ca2+ in the body?

Correct AnswerverifiedShow Answer

From the outside of a muscle coming in, the first thing encountered would be

Correct AnswerverifiedA

Because the heart beats continuously, cardiac fibers never relax completely.

Correct AnswerverifiedShow Answer

What supplies the energy for muscle contraction?

Correct AnswerverifiedShow Answer

Muscles can only pull; they cannot push.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Fast-twitch muscle fibers are usually ae...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

What is the reservoir for Ca²⁺ in the body?

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified