Chapter 08 Muscular System

Chapter 08: Muscular System


MULTIPLE CHOICE

1. Striations are found in
a. smooth muscle
b. skeletal muscle
c. cardiac muscle
d. both b and c
ANS: D DIF: Application REF: p. 156 OBJ: 1
TOP: Muscle tissue

2. Intercalated disks are found in
a. smooth muscle
b. skeletal muscle
c. cardiac muscle
d. voluntary muscle
ANS: C DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle tissue

3. Another name for smooth muscle is
a. cardiac muscle
b. visceral muscle
c. voluntary muscle
d. skeletal muscle
ANS: B DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle tissue

4. Another name for skeletal muscle is
a. cardiac muscle
b. visceral muscle
c. voluntary muscle
d. involuntary muscle
ANS: C DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle tissue

5. The muscle attachment to the more movable bone is called the
a. origin
b. insertion
c. tendon
d. bursae
ANS: B DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle organs

6. The muscle attachment to the more stationary bone is called the
a. origin
b. insertion

, c. tendon
d. bursae
ANS: A DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle organs

7. The connective tissue that attaches muscle to bone is called
a. origin
b. insertion
c. tendon
d. bursae

ANS: C DIF: Memorization REF: p. 156
OBJ: 1 TOP: Muscle organs

8. A fluid-filled sac that acts as a lubricating structure for muscle movement is a(n)
a. origin
b. insertion
c. tendon
d. bursae
ANS: D DIF: Memorization REF: pp. 156-157
OBJ: 1 TOP: Muscle organs

9. If an injury caused damage to the insertion of the biceps brachii muscle (the anterior muscle
of the upper arm), the injury would be nearest
a. the shoulder
b. the middle of the upper arm
c. the elbow
d. none of the above
ANS: C DIF: Synthesis REF: pp. 159-160 OBJ: 1
TOP: Muscle organs

10. The thin myofilament of the skeletal muscles is made of
a. sarcomere
b. actin
c. myosin
d. Z lines
ANS: B DIF: Memorization REF: p. 157
OBJ: 2 TOP: Microscopic structure and function

11. The thick myofilament of the skeletal muscles is made of
a. sarcomere
b. actin
c. myosin
d. Z lines
ANS: C DIF: Memorization REF: p. 157
OBJ: 2 TOP: Microscopic structure and function

12. The basic contractile unit of a skeletal muscle is the

, a. sarcomere
b. actin
c. myosin
d. Z lines
ANS: A DIF: Memorization REF: p. 157
OBJ: 2 TOP: Microscopic structure and function

13. When a muscle contraction occurs
a. the actin gets shorter
b. the myosin gets shorter
c. the Z lines are pulled closer together
d. both a and b
ANS: C DIF: Synthesis REF: p. 157 OBJ: 2
TOP: Microscopic structure and function

14. According to the sliding filament model, in order for a sarcomere to contract
a. bridges must form between the actin and myosin
b. calcium must be released from the endoplasmic reticulum
c. adenosine triphosphate (ATP) must be broken down for energy
d. all of the above
ANS: D DIF: Memorization REF: p. 157
OBJ: 2 TOP: Microscopic structure and function

15. To produce smooth movement at a joint
a. the prime mover and antagonists must contract
b. the antagonist and synergists must contract
c. the prime mover and synergists must contract
d. both a and b above
ANS: C DIF: Memorization REF: p. 159
OBJ: 2 TOP: Movement

16. Tonic contractions
a. move a muscle through a full range of motion
b. do not shorten the muscle
c. are important in maintaining posture
d. both b and c above
ANS: D DIF: Memorization REF: p. 160
OBJ: 3 TOP: Posture

17. The point of contact between the nerve and the muscle fibers it stimulates is called a
a. motor unit
b. neuromuscular junction
c. motor neuron
d. neurotransmitter
ANS: B DIF: Memorization REF: p. 161
OBJ: 2 TOP: Motor unit