Question 1

What ion is responsible for initiating muscle contraction?

Accepted Answer

A)  Mg2+ 
B)  Ca2+ 
C)  H+ 
D)  Cl- 
E)  Na+ 
A)  Mg2+ 
B)  Ca2+ 
C)  H+ 
D)  Cl- 
E)  Na+

Question 2

One motor neuron activates one muscle fiber.

Accepted Answer

A) True 
 B)False

Question 3

How are muscles attached to bone?

Accepted Answer

A)  with ligaments 
B)  with tendons 
C)  with bursae 
A)  with ligaments 
B)  with tendons 
C)  with bursae

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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)  myoglobin 
A)  sarcoplasmic reticulum 
B)  gap junctions 
C)  dense connective tissue 
D)  bone 
E)  myoglobin

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 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. 
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.

Question 8

The origin of a muscle is on a stationary bone.

Accepted Answer

A) True 
 B)False

Question 9

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 10

What supplies the energy for muscle contraction?

Accepted Answer

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

Question 11

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, testosterone 
A)  parathyroid hormone, tropomyosin 
B)  acetylcholine, calcitonin 
C)  parathyroid hormone, calcitonin 
D)  acetylcholine, tropomyosin 
E)  parathyroid hormone, testosterone

Question 12

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

Accepted Answer

A)  large 
B)  small 
C)  huge 
D)  long 
E)  short 
A)  large 
B)  small 
C)  huge 
D)  long 
E)  short

Question 13

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

Question 14

A muscle fiber is made up of many

Accepted Answer

A)  muscle cells. 
B)  T tubules. 
C)  myofibrils. 
D)  fascicles. 
E)  bursa. 
A)  muscle cells. 
B)  T tubules. 
C)  myofibrils. 
D)  fascicles. 
E)  bursa.

Question 15

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

Question 16

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

Accepted Answer

A)  rib 
B)  clavicle 
C)  sternum 
D)  mastoid process 
A)  rib 
B)  clavicle 
C)  sternum 
D)  mastoid process

Question 17

What does the word sarco mean?

Accepted Answer

A)  large 
B)  short 
C)  muscle 
D)  tubule 
E)  smooth 
A)  large 
B)  short 
C)  muscle 
D)  tubule 
E)  smooth

Question 18

When a muscle contracts,the H zone almost disappears.

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. 
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.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 12: Muscular System

What ion is responsible for initiating muscle contraction?

One motor neuron activates one muscle fiber.

How are muscles attached to bone?

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

What is found within the intercalated disks of cardiac muscle?

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

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

The origin of a muscle is on a stationary bone.

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

What supplies the energy for muscle contraction?

What two hormones regulate calcium homeostasis?

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

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

A muscle fiber is made up of many

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

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

What does the word sarco mean?

When a muscle contracts,the H zone almost disappears.

What happens when the arrector pili muscles contract?

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

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