________ neurons possess one axon and one dendrite.
A) Bipolar
B) Multipolar
C) Unipolar
D) Anaxonic
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Question 2) Which of the following types of neurons serves as motor neurons for voluntary and involuntary movements?
A) bipolar neurons
B) anaxonic neurons
C) unipolar neurons
D) multipolar neurons
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Question 3) Extension at the knee involves ________.
A) concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group
B) eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group
C) isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group
D) isotonic contraction of both the hamstring group and the quadriceps femoris group
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Question 4) A period of sustained muscle contraction is called ________.
A) tetanus
B) lockjaw
C) incomplete tetanus
D) muscle tension
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Question 5) Flexion at the knee involves ________.
A) isotonic contraction of both the hamstring group and the quadriceps femoris group
B) eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group
C) concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group
D) isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group
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Question 6) An individual's measured range of motion upon abduction of the right shoulder is 90 degrees and upon adduction is 120 degrees. Which of the following statements about range of motion is true?
A) The range of motion at the shoulder joint is above average for adduction and above average for adduction.
B) The range of motion at the shoulder joint is above average for each movement.
C) The range of motion at the shoulder joint is below average for both abduction and adduction.
D) The range of motion at the shoulder joint is below average for adduction and normal for adduction.
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Question 7) If your lab partner measures the angle formed between your arm and your shoulder as you adduct your arm such that it crosses anterior to your torso, which type of flexibility is being measured?
A) static
B) dynamic
C) goniometer
D) muscle
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Question 8) Which of the following must occur for muscles to recover from fatigue?
A) ATP is produced via aerobic respiration.
B) Lactic acid builds up in the sarcolemma of muscle cells.
C) Muscle cells start to make ATP in anaerobic conditions.
D) Lactic acid is metabolized to pyruvate or glucose and ATP reserves are restored.
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Question 9) Which activity will result in the recruitment of the highest number of motor units?
A) lifting a 10-lb barbell
B) lifting a 2-lb barbell
C) lifting a 25-lb barbell
D) lifting a 5-lb barbell
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Question 10) Why is it easier to lift an ink pen than it is to lift a 25-lb barbell?
A) It requires fewer motor units to lift the ink pen.
B) It takes more time for muscle tension to exceed the load of a light object than a heavy object.
C) The time for muscle tension to exceed load is not dependent on the mass of an object.
D) It takes less time for muscle tension to exceed the load of a heavy object than a light object.
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