Matching
A) A band
B) Z discs
C) I band
D) Myosin
22) A sarcomere is the distance between two ________.
23) The ________ contains only the actin filaments.
24) The thicker filaments are the ________ filaments.
25) Both actin and myosin are found in the ________.
26) The myosin filaments are located in the ________.
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Question 2) Matching
A) Tetanus
B) Maximal stimulus
C) Wave summation
D) Muscle tone
E) Multiple motor unit summation
17) The stimulus above which no stronger contraction can be elicited, because all motor units are firing in the muscle.
18) Determined by alternating motor units of a muscle organ even when the muscle is at rest.
19) Continued sustained smooth contraction due to rapid stimulation.
20) The situation in which contractions become stronger due to stimulation before complete relaxation occurs.
21) How a smooth increase in muscle force is produced.
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Question 3) A motor neuron and all the muscle cells that it stimulates are referred to as a motor end plate.
Indicate whether the statement is true or false
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Question 4) Saddle joints have concave and convex surfaces. Identify a saddle joint of the skeleton.
A) carpometacarpal joint of the phalanges
B) carpometacarpal joint of the thumb
C) metacarpophalangeal joint of the finger
D) interphalangeal joint of the finger
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Question 5) Matching
A) A
B) E
C) D
D) C
E) B
1) Connective tissue sheath surrounding individual muscle fibers.
2) Bundle of muscle cells surrounded by a perimysium.
3) Connective tissue covering the exterior of a muscle organ.
4) Connective tissue surrounding muscle fiber bundles.
5) Individual muscle fiber.
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Question 6) Matching
A) Slow (oxidative), fatigue-resistant fibers
B) Fast (oxidative or glycolytic), fatigable fibers
C) Fast (oxidative or glycolytic), fatigable fibers
11) Depends on oxygen delivery and aerobic mechanisms.
12) Have very fast-acting myosin ATPases and depend upon anaerobic metabolism during contraction.
13) Red fibers, the smallest of the fiber types.
14) Contain abundant amounts of glycogen.
15) Abundant in muscles used to maintain posture.
16) A relatively high percentage are found in successful marathon runners.
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Question 7) Matching
A) E
B) A
C) D
D) C
E) B
6) I band.
7) H zone.
8) A band.
9) Z disc.
10) M line.
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Question 8) Eccentric contractions are more forceful than concentric contractions.
Indicate whether the statement is true or false
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Question 9) Which of the following statements best describes angular movements?
A) They change (increase or decrease) the angle between two bones.
B) They occur only between bones with flat articular processes.
C) They turn a bone along its own long axis.
D) They allow movement only in one plane.
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Question 10) For each of the following movements, indicate the specific kind of joint involved (e.g., hinge, etc.) and the movement performed (e.g., extension, etc.).
a. Bending the elbow: ________, ________.
b. Turning head side to side: ________, ________.
c. Lowering your arm to your side in the frontal plane: ________, ________.
d. Turning the sole of foot medially: ________, ________.
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