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Muscle and Joints Test Key

Name:________________________________________

Test 2: Joints, Muscles, and Muscle Tissue

Part 1: Dichotomous

1. Which of the following is an example of an eccentric exercise?

Standing up on your tip toes

Slowly lowering yourself towards the ground while doing a pushup

2. Which of the following choices describes skeletal muscles

Powerful but easily fatigued

Produce slow sustained contractions and are found in the walls of hollow organs

3. What is the final trigger for muscle contraction?

Calcium

An action potential from a neuron

4. Freely moveable joints are also called

Synarthroses

Diarthroses

5. Which structure is present in all synovial joints?

Bursae

A joint cavity

6. Which of the following is an autoimmune disorder?

Rheumatoid Arthritis

Osteoarthritis

7. Which of the following can be voluntarily controlled

Smooth muscle

Skeletal Muscle

8. Which tissue is striated

Cardiac muscle

Smooth Muscle

9. Striations in skeletal muscle tissue are due to

Alternating bands of Light I bands and Dark A bands

Gaps between the cell membranes of adjacent muscle fibers

10. The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is called the

Perimysium

Endomysium

11. A fascicle is a

Bundle of muscle fibers enclosed by a connective tissue sheath

Bundle of myofibrils enclosed by a sarcolemma

12. Which region of a sarcomere disappears during a maximal contraction?

The Dark A band

The H zone

13. What is the purpose of the t tubules?

To conduct the action potential produced at the neuromuscular junction deep into the muscle fiber.

To store and release calcium into the sarcoplasm when stimulated

14. What is a motor unit?

A single motor neuron and all of its associated muscle fibers

All of the sarcomeres contained within one myofibril

15. What property of muscle tissue allows it to return to its original length after being stretched?

Elasticity

Contractility

16. What causes muscle fatigue?

Low dietary calcium intake

Ionic disturbances along the cell membrane 

17. Which ATP production pathway would be relied upon heavily during the first 15 seconds of a full sprint?

Direct Phosphorylation Pathway

Aerobic Glycolysis Pathway

18. In terms of a synovial joint, stability increases as mobility_________

Decreases

Increases

19. Which structure is an example of an intracapsular ligament?

ACL (anterior crucate ligament)

MCL (medial Collateral ligament)

20. Where would we expect to find a greater density of mitochondria?

Slow oxidative muscle fibers

Fast Glycotic muscle fibers

21. Which protein blocks Actin’s myosin binding sites in a resting muscle?

ATPase

Tropomyosin

22. Which activity would require the recruitment of a greater number of motor units?

Lifting a paperclip

Lifting a bowling ball

23. In the above scenario, which motor units would be activated first?

The smallest motor units

The largest motor units

24. What substance is released into the synaptic cleft after an action potential reaches the end of an axon?

AcetylCholine

Calcium

25. What is the name of the early action potential formed in the sarcolemma after it is exposed to acetylcholine at the synaptic cleft?

Fused Tetanus

An end plate potential

26. Which joint would you expect to be more likely to dislocate?

The ulnohumeral (elbow) joint

The Temporomandibular joint

27.When considering the gluteal muscles, you would expect to find higher concentrations of ionic calcium in the intracellular fluid when

Performing a squat

Sleeping

28. What is the only source of fuel for muscle contraction?

Glucose

ATP

29. Where would you expect to find smaller motor units?

The muscles that move your eyes

You Quadriceps (thigh) muscles

30. Under what circumstances would you expect the biceps muscle to be able to produce a greater amount of tension?

In a fully shortened (flexed) position.

At resting length, or at a very slightly lengthened positioned

31. Under optimal circumstances, which pathway can produce ATP for a greater period of time?

Anaerobic (Glycolysis) Pathway

Aerobic (Oxidative) Pathway

32. Because muscle tissue is able to respond to a stimulus (action potential) it is said to be ________

Excitable

Extensible

33. What is the fundamental contractile unit of skeletal muscle tissue?

The thin filament

The sarcomere

34. Which of the following is an example of a fibrous joint?

A gomphosis

A synchondrosis

35. Which of the following joints would you expect to have 3 degrees of freedom?

The knee (tibiofemoral joint)

The shoulder (glenohumeral joint)

36. What type of connective tissue would you expect to find covering the articular surfaces of a joint?

Periosteum

Hyaline Cartilage

37. What plane do the motions abduction and adduction occur in?

Sagittal plane

Frontal (coronal) plane

38. In what position are the ligaments of the knee the tightest?

Full knee extension

Full knee flexion

39. Which layer of the articular capsule secretes synovial fluid?

The fibrous layer

The synovial membrane

40. The walls of the T tubules are a part of the

Sarcolemma

Sarcoplasmic Reticulum

T or F (Mark A or B on your scantron)

41. During a skeletal muscle contraction, the light I bands shorten. T

42. During a skeletal muscle contraction the Z discs move closer together. T

43. A muscle twitch is an ENTIRE muscle’s response to a single action potential. F

44. Skeletal muscle is a type of epithelial tissue. F

45. Skeletal muscle is more easily fatigued than cardiac muscle. T

46.Unlike cardiac muscle, skeletal muscle does not require nervous system innervation in order to contract. F

47. Gap junctions are found in skeletal muscle, not cardiac muscle. F

48. Larger motor units are capable of producing more tension than smaller motor units T

49. Synovial Joints are usually also synarthrodial. F

50. Most joints of the limbs are diarthrodial. T

51. Most joints of the limbs are synovial. T

52. The elbow (ulnohumeral) joint allows abduction and adduction. F

53. The elbow (ulnohumeral) joint allows movements that occur in the sagittal plane. T

54. Gouty Arthritis is most likely to occur in the glenohumeral joint. F

55. About 80% of a Fast glycotic fiber’s cytoplasm is packed with mitochondria. F

56. Smooth muscle tissue is striated. F

57. No change in muscle length occurs during an isometric contraction. T

58. No change in muscle length occurs during an isotonic contraction. F

59. A marathoner is likely to have a greater percentage of type I fibers than a weightlifter. T

60. The relative percentages of Type I, Type IIa, and Type IIb fibers are permanent, and do not change after birth. F

One comment on “Muscle and Joints Test Key

  1. tlohman2
    December 5, 2013

    Let me know if you have questions guys! It’s possible I could’ve made a mistake in my quick creation of this key (don’t worry, I was very careful creating the key I used to grade the test!)… so if you are concerned about something, speak up!

    Trevor

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