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, Human Anatomy & Physiology 1(SCB 203) Practice
Quiz 4 Review Questions and Answers | 100% Pass
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Read All Instructions Carefully and Answer All
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SCB 203
PRACTICE QUIZ #4
1. Which of the following is a true statement concerning skeletal
muscle?
A) they lack a cell membrane B) they are very small
C) they are sometimes called “striated muscle” D) none of
the above
2. The contracting unit of a muscle cell is a:
A) sarcolemma B) transverse tubule
C) sarcomere D) myofilament
3. Myosin is an example of a myofilament [TRUE (A) or FALSE (B)].
4. Only thick myofilaments are found in this area of the sarcomere:
A) I band B) Z line
C) H zone D) A band
5. The cell membrane of a muscle cell is the:
A) motor end plate B) sarcomere
C) sarcolemma D) sarcoplasmic reticulum
6. Creatine phosphate:
A) is stimulated by Ca+2. B) is degraded by CPK.
C) is formed during glycolysis D) is stored in the SR.
7. Which of the following is a normal event?
A) a muscle twitch B) tetanus
C) wave summation D) fatigue
8. Maintaining posture is an example of muscle:
, A) tension B) atrophy
C) tone D) fatigue
9. Individual muscle fibers are actually:
A) muscle cells B) sarcomeres
C) tendons D) myofibrils
10. An example of a neurotransmitter is:
A) acetylcholinesterase B) acetylcholine
C) ATPase D) Ca+2 ions
11. The increase in the amount of muscle fibers contracting due to an
increase in nerve stimulation is known as:
A) a muscle twitch B) wave summation
C) treppe D) recruitment
, 12. Only skeletal muscle can display:
A) wave summation B) complete tetanus
C) treppe D) all of the above
13. If an area of skeletal muscle were to have large numbers of
motor units, one would expect to see an increase of:
A) muscle strength B) precise movements
C) muscle fatigue D) energy
14. The place where skeletal muscle and a motor neuron meet, is called
the:
A) sarcoplasm B) SR
C) synaptic vesicle D) NMJ
15. The cross bridges of myosin:
A) store creatine -P B) conduct action potentials
C) store ATP D) store Ca+2 ions
Match the following muscle types with their correct description.
Answers may be used more than once or not at all.
A) Cardiac muscle B) Smooth muscle C) Skeletal muscle
D) All of the above muscles E) None of the above
muscles
16. This muscle is found in abundance in the digestive tract .
17. This muscle has actin and myosin .
18. This muscle has no striations .
19. This muscle never needs nerve stimulation to contract .
20. These muscle fibers can branch .
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