Basic Biochemical Concepts (Msq Drill 201)
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- 1.
This is a 1st, 2nd or 3rd class lever?
- A.
1st class
- B.
2nd class
- C.
3rd class
Correct Answer
A. 1st class -
- 2.
Is this a 2nd or 3rd class lever?
- A.
2nd class lever
- B.
3rd class lever
Correct Answer
B. 3rd class lever -
- 3.
This is a 2nd class lever. When comparing this to the human body, the effort is equivalent to:
- A.
Muscle contraction
- B.
Resistance
- C.
Joint
Correct Answer
A. Muscle contraction -
- 4.
In the human being which of the following can be regarded as the load?
- A.
Weight
- B.
Resistance
- C.
Through the center of gravity of a body or body part
- D.
Muscle contraction
Correct Answer(s)
A. Weight
B. Resistance
C. Through the center of gravity of a body or body part -
- 5.
In which lever do you have the fulcrum located in between the muscle contraction and the resistance?
- A.
1st class lever
- B.
2nd class lever
- C.
3rd class lever
Correct Answer
A. 1st class lever -
- 6.
An example of a class 1 lever is that of the _________ muscles offsetting the weight of the front of the head and the fulcrum being the head on the cervical vertebrae.
- A.
Trapezius
- B.
Suprapinatus
- C.
Paraspinal
- D.
Latissimus dorsi
Correct Answer
C. Paraspinal -
- 7.
2nd class levers are very common in the human body. True or false?
- A.
True, they are very common
- B.
False, they are very rare
Correct Answer
B. False, they are very rare -
- 8.
What is the most common type of lever in the human body?
- A.
1st class lever
- B.
2nd class lever
- C.
3rd class lever
Correct Answer
C. 3rd class lever -
- 9.
In a third class lever, is the effort and load on one side of the fulcrum or they are on either side of the fulcrum?
- A.
Effort and load are on one side of the fulcrum in a 3rd class lever
- B.
Effort and load are on either side of the fulcrum in a 3rd class lever
Correct Answer
A. Effort and load are on one side of the fulcrum in a 3rd class lever -
- 10.
If you move the fulcrum close to the muscle in a 1st class lever, does force have advantage over speed or does speed have advantage over force?
- A.
Force has advantage over speed
- B.
Speed has advantage over force
Correct Answer
B. Speed has advantage over force -
- 11.
So, if the fulcrum is moved closer to the load or resistance in a 1st class lever then force has advantage over speed?
- A.
Yes
- B.
No
Correct Answer
A. Yes -
- 12.
2nd class levers ALWAYS favor:
- A.
force
- B.
Speed
Correct Answer
A. force -
- 13.
Which of the following accurately describes a 2nd class lever?
- A.
The resistance or load is between the fulcrum and muscle contraction
- B.
The muscle contraction is between the resistance and the fulcrum
- C.
The fulcrum is between the muscle contraction and the resistance
Correct Answer
A. The resistance or load is between the fulcrum and muscle contraction -
- 14.
Trying to pry open a paint can with a screw driver is an example of a 1st class lever in which the fulcrum has been moved closer or farther away from the muscle contraction?
- A.
Closer to the muscle contraction
- B.
Farther from the muscle contraction
Correct Answer
B. Farther from the muscle contraction -
- 15.
Trying to pry open a lid of a paint can with a screwdriver illustrates a 1st class lever in which force is favored or speed is favored?
- A.
Force is favored
- B.
Speed is favored
Correct Answer
A. Force is favored -
- 16.
3rd class levers mostly favor force or speed?
- A.
Force
- B.
Speed
Correct Answer
B. Speed -
- 17.
Are joints typically fulcrums?
- A.
Yes
- B.
No
Correct Answer
A. Yes -
- 18.
This is a first class lever in which the fulcrum has been moved closer to the muscle contraction. This results in:
- A.
Speed advantage over force
- B.
Force advantage over speed
Correct Answer
A. Speed advantage over forceExplanation
Catapult: Quick release, long lever armRate this question:
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- 19.
A screwdriver being used to pry open the lid of a paint can. Do you move the fulcrum below cler to the effort or closer to the load?A)
- A.
Closer to the effort
- B.
Closer to the load
Correct Answer
B. Closer to the load -
- 20.
What is this lever?
- A.
1st class
- B.
2nd class
- C.
3rd class
Correct Answer
B. 2nd class -
- 21.
Name the lever:
- A.
1st class lever
- B.
2nd class lever
- C.
3rd class lever
Correct Answer
C. 3rd class lever -
- 22.
Does this lever favor speed or force?
- A.
Speed favored over force
- B.
Force favored over speed
Correct Answer
A. Speed favored over force -
- 23.
If the ball in the hand is replaced with a bigger ball that is twice the weight of the original ball, does the center of gravity shift towards or away from the original force M?
- A.
Towards force M
- B.
Further away from force M
Correct Answer
B. Further away from force MExplanation
Because the center of gravity shifts away from the original force M, the new distance must be added to the original vector.Rate this question:
-
- 24.
Increasing the distance of the long vector by increasing the weight of the ball and thus moving the center of gravity will result in:
- A.
More muscle energy being needed
- B.
Less muscle energy being needed
Correct Answer
A. More muscle energy being needed -
- 25.
At 30 degrees of flexion what are the three subcomponents of muscle forces
- A.
Skin
- B.
Flexion at the joint
- C.
Force running parallel to the bony anatomy
- D.
Action of the antagonist extensor
Correct Answer(s)
A. Skin
B. Flexion at the joint
C. Force running parallel to the bony anatomy -
- 26.
Which of the three forces that make up the muscular force is responsible for stabilizing the joint?
- A.
Skin
- B.
Flexion at the joint
- C.
Force running parallel to the bony anatomy
Correct Answer
C. Force running parallel to the bony anatomy -
- 27.
The force of the brachialis is shared between which two elements?
- A.
Stabilizing the joint
- B.
Extending and flexing the joint
- C.
Translating the elbow
Correct Answer(s)
A. Stabilizing the joint
C. Translating the elbowExplanation
i.e the tangential force and the stabilization forceRate this question:
-
- 28.
Is more force allocated to stabilizing the elbow or to flexing the elbow when the brachialis contracts at a lower degree of flexion
- A.
Stabilizing the elbow
- B.
Flexing the elbow
Correct Answer
A. Stabilizing the elbow -
- 29.
The most efficient joint angle to use the brachialis is at
- A.
10% flexion
- B.
20 degrees of flexion
- C.
45 degrees of flexion
- D.
75 degrees of flexion
- E.
90 degrees of lexion
Correct Answer
E. 90 degrees of lexion -
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Jan 11, 2013Quiz Edited by
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Apr 19, 2010Quiz Created by
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