1. What are the three types of muscles found in the muscular system

1. What are the three types of muscles found in the muscular system

• A. Skeletal, cardiac, muscle fibers• B. Skeletal, cardiac, smooth• C. Skeletal, smooth, connective• D. Smooth, cardiac, connective

2. The contraction of a muscle is due to the movement of

• A. Skeletal muscle• B. Muscle fibers• C. Myofibrils• D. sarcolemma

3. Striated, multi-nucleated cells belong to

• A. Skeletal muscle• B. Cardiac muscle• C. Smooth muscle• D. Connective tissue

5. All muscles are involved in

• A. Movement• B. Digestion• C. Posture• D. support

7. Muscle cells are surrounded and bundled by

• A. Tendons• B. Muscle fibers• C. Ligaments• D. Connective tissue

8. The prefix that is used when referring to muscle structure

• A. Myo, mys• B. Mys, endo• C. Epi, endo• D. Myo, peri

9. All of the following are functions of skeletal muscles EXCEPT

• A. Posture• B. Heat generation• C. Movement• D. physique

10. The connective tissue that wraps and protects each individual muscle fiber

• A. Epimysium• B. Perimysium• C. Endomysium• D. fascia

11. The connective tissue that surround and protects the fascicle

• A. Epimysium• B. Perimysium• C. Endomysium• D. fascia

12. Another name for muscle fiber is

• A. Sarcolemma• B. Sarcomere• C. Muscle cell• D. Myofibril

13. The _____________ is the plasma membrane of the muscle fiber

• A. Sarcolemma• B. Sarcomere• C. Sarcoplasmic reticulum• D. Myosin filament

14. This organelle is responsible for the shortening of the muscle during contraction

• A. Sarcolemma• B. Sarcomere• C. Sarcoplasmic reticulum• D. Myofibril

15. Thick filaments are composed of the protein

• A. Actin• B. Myosin• C. Insulin• D. Leucine

16. The thin filaments are anchored to the Sarcomere by the

• A. I band• B. A band• C. H zone• D. Z disc

17. One motor neuron and all the skeletal muscle cells stimulated by that neuron is called a

• A. Fascicle• B. Nerve bundle• C. Motor unit• D. Motor cell

18. The junction between the axon terminal and the muscle it is stimulating

• A. Synaptic cleft• B. Neuromuscular junction• C. Synaptic junction• D. Neurotransmitter junction

19. When an action potential reaches the axon terminal, ____________ are released

• A. Neurons• B. Vesicles• C. Neurotransmitters• D. hormones

20. The specific neurotransmitter involved in skeletal muscle contraction is

• A. Adenosine triphosphate• B. Adenosine diphosphate• C. Deoxyribonucleic acid• D. Acetyl Choline

Energy for muscle contraction primarily comes from

• A. ATP• B. ADP• C. Ach• D. CP

24. During a contraction the __________ gets shorter

• A. Sarcomere• B. Neuromuscular junction• C. Motor Unit• D. neurotransmitter

The protein actin is found on the

• A. Thick filament• B. Myosin• C. Thin filament• D. Muscle cell

26. Ca⁺ is stored and released by the

• A. Sarcoplasmic reticulum• B. Nucleus• C. Sarcomere• D. Myofibril

27. During contraction the ________ slide over the ____________, taking up the space of the ___________

• A. Thick filaments, thin filaments, bare zone• B. Thin filaments, thick filaments, bare zone• C. Thin filaments, thick filaments, z disc• D. Thick filaments, thin filaments, z disc

28. The previous action is part of the

• A. Sliding filament theory• B. Graded response• C. Extensibility• D. contractility

29. Ability to receive and respond to a stimulus

• A. Excitability• B. Contractility• C. Extensibility• D. Elasticity

30. Ability of muscle cells to shorten when an adequate stimulus is received

• A. Excitability• B. Contractility• C. Extensibility• D. Elasticity

31. Ability of muscle cells to be stretched

• A. Excitability• B. Contractility• C. Extensibility• D. Elasticity

32. Ability of muscle cells to recoil and resume resting length after stretching

• A. Excitability• B. Contractility• C. Extensibility• D. Elasticity

Study diagram

• Muscle fiber• Endomysium• Fascicle• Perimysium• epimysium

Muscle fiber diagram

• Has nucleus so it MUST be the muscle cell– Myofibril– Nucleus– Sarcolemma (cell

membrane of muscle)

Myofibril diagram

• Myofibril• Sarcomere• Z disc• Light band (I band)• Dark band(A band)• Thick and thin

filaments

Microfilaments (thick and thin)

• Sarcomere• Z disc• Thin fimaments• Thick filaments

Answers• B• C• A• A• D• A• D• C• B• C• A• D• B• D

• C• B• C• D• A• A• C• A• B• A• A• B• C• D