Question 1

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

Question 2

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 3

What does the word brevis mean when referring to a muscle?

Accepted Answer

A)   large
B)   small
C)   huge
D)   long
E)   shortF) A) and E)
G) A) and B)

Question 4

When a muscle contracts,the H zone almost disappears.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following does not attach to the sternocleidomastoid muscle?

Accepted Answer

A)   rib
B)   clavicle
C)   sternum
D)   mastoid processE) C) and D)
F) All of the above

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

One motor neuron activates one muscle fiber.

Accepted Answer

A) True 
 B)False

Question 8

What supplies the energy for muscle contraction?

Accepted Answer

A)   actin
B)   myosin
C)   tropomyosin
D)   ATP
E)   Ca2+F) A) and B)
G) C) and D)

Question 9

A muscle fiber is made up of many

Accepted Answer

A)   muscle cells.
B)   T tubules.
C)   myofibrils.
D)   fascicles.
E)   bursa.F) A) and C)
G) None of the above

Question 10

What does the word sarco mean?

Accepted Answer

A)   large
B)   short
C)   muscle
D)   tubule
E)   smoothF) A) and D)
G) B) and C)

Question 11

The origin of a muscle is on a stationary bone.

Accepted Answer

A) True 
 B)False

Question 12

What ion is responsible for initiating muscle contraction?

Accepted Answer

A)   Mg2+
B)   Ca2+
C)   H+
D)   Cl-
E)   Na+F) All of the above
G) B) and E)

Question 13

What is found within the intercalated disks of cardiac muscle?

Accepted Answer

A)   sarcoplasmic reticulum
B)   gap junctions
C)   dense connective tissue
D)   bone
E)   myoglobinF) D) and E)
G) A) and B)

Question 14

How are muscles attached to bone?

Accepted Answer

A)   with ligaments
B)   with tendons
C)   with bursaeD) B) and C)
E) None of the above

Question 15

If you lock your knees while standing you may pass out because of the lack of venous return to the heart.

Accepted Answer

A) True 
 B)False

Question 16

What two hormones regulate calcium homeostasis?

Accepted Answer

A)   parathyroid hormone, tropomyosin
B)   acetylcholine, calcitonin
C)   parathyroid hormone, calcitonin
D)   acetylcholine, tropomyosin
E)   parathyroid hormone, testosteroneF) C) and E)
G) B) and E)

Question 17

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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 B)
G) D) and E)

Question 20

Which of the following is not a source of ATP for muscle contraction?

Accepted Answer

A)   ATP in the blood
B)   ATP stored in the cell
C)   the creatine phosphate pathway
D)   fermentation
E)   aerobic respirationF) D) and E)
G) A) and C)

Exam 12: Muscular System

What does the word sarco mean?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The origin of a muscle is on a stationary bone.

Correct AnswerverifiedShow Answer

One motor neuron activates one muscle fiber.

Correct AnswerverifiedShow Answer

What ion is responsible for initiating muscle contraction?

Correct AnswerverifiedShow Answer

What supplies the energy for muscle contraction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a source of ATP for muscle contraction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When a muscle contracts,the H zone almost disappears.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following does not attach to the sternocleidomastoid muscle?

Correct AnswerverifiedShow Answer

How are muscles attached to bone?

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What happens when the arrector pili muscles contract?

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What does the word brevis mean when referring to a muscle?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is found within the intercalated disks of cardiac muscle?

Correct AnswerverifiedShow Answer

If you lock your knees while standing you may pass out because of the lack of venous return to the heart.

Correct AnswerverifiedShow Answer

A muscle fiber is made up of many

Correct AnswerverifiedShow Answer

What two hormones regulate calcium homeostasis?

Correct AnswerverifiedShow Answer

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