Basic Biochemical Concepts (Msq Drill 201)

1.
Does this lever favor speed or force?

Speed favored over force

Force favored over speed

2. In which lever do you have the fulcrum located in between the muscle contraction and the resistance?

1st class lever

2nd class lever

3rd class lever

3. Are joints typically fulcrums?

Yes

No

4. 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?

Effort and load are on one side of the fulcrum in a 3rd class lever

Effort and load are on either side of the fulcrum in a 3rd class lever

5.

Increasing the distance of the long vector by increasing the weight of the ball and thus moving the center of gravity will result in:

More muscle energy being needed

Less muscle energy being needed

6. So, if the fulcrum is moved closer to the load or resistance in a 1st class lever then force has advantage over speed?

Yes

No

7. This is a 1st, 2nd or 3rd class lever?

1st class

2nd class

3rd class

8. 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)

Closer to the effort

Closer to the load

9. Which of the following accurately describes a 2nd class lever?

The resistance or load is between the fulcrum and muscle contraction

The muscle contraction is between the resistance and the fulcrum

The fulcrum is between the muscle contraction and the resistance

10.
What is this lever?

1st class

2nd class

3rd class

11.
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?

Towards force M

Further away from force M

Because the center of gravity shifts away from the original force M, the new distance must be added to the original vector.

Explanation

Because the center of gravity shifts away from the original force M, the new distance must be added to the original vector.

12.
This is a first class lever in which the fulcrum has been moved closer to the muscle contraction. This results in:

Speed advantage over force

Force advantage over speed

Catapult: Quick release, long lever arm

Explanation

Catapult: Quick release, long lever arm

13.
Name the lever:

1st class lever

2nd class lever

3rd class lever

14. 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?

Force is favored

Speed is favored

15. 2nd class levers ALWAYS favor:

Force

Speed

16. 3rd class levers mostly favor force or speed?

Force

Speed

17. 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?

Closer to the muscle contraction

Farther from the muscle contraction

18. 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?

Force has advantage over speed

Speed has advantage over force

19. 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.

Trapezius

Suprapinatus

Paraspinal

Latissimus dorsi

20. What is the most common type of lever in the human body?

1st class lever

2nd class lever

3rd class lever

21. Is more force allocated to stabilizing the elbow or to flexing the elbow when the brachialis contracts at a lower degree of flexion

Stabilizing the elbow

Flexing the elbow

22.

Is this a 2nd or 3rd class lever?

2nd class lever

3rd class lever

23. 2nd class levers are very common in the human body. True or false?

True, they are very common

False, they are very rare

24.

This is a 2nd class lever. When comparing this to the human body, the effort is equivalent to:

Muscle contraction

Resistance

Joint

25. Which of the three forces that make up the muscular force is responsible for stabilizing the joint?

Skin

Flexion at the joint

Force running parallel to the bony anatomy

26. The most efficient joint angle to use the brachialis is at

10% flexion

20 degrees of flexion

45 degrees of flexion

75 degrees of flexion

90 degrees of lexion

27. The force of the brachialis is shared between which two elements?

Stabilizing the joint

Extending and flexing the joint

Translating the elbow

i.e the tangential force and the stabilization force

Explanation

i.e the tangential force and the stabilization force

Submit

28.

In the human being which of the following can be regarded as the load?

Weight

Resistance

Through the center of gravity of a body or body part

Muscle contraction

Submit

29. At 30 degrees of flexion what are the three subcomponents of muscle forces

Skin

Flexion at the joint

Force running parallel to the bony anatomy

Action of the antagonist extensor

Submit

Basic Biochemical Concepts (Msq Drill 201)

1. Does this lever favor speed or force?

2.

What first name or nickname would you like us to use?

2. In which lever do you have the fulcrum located in between the muscle contraction and the resistance?

3. Are joints typically fulcrums?

4. 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?

5. Increasing the distance of the long vector by increasing the weight of the ball and thus moving the center of gravity will result in:

6. So, if the fulcrum is moved closer to the load or resistance in a 1st class lever then force has advantage over speed?

7. This is a 1st, 2nd or 3rd class lever?

8. 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)

9. Which of the following accurately describes a 2nd class lever?

10. What is this lever?

11. 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?

12. This is a first class lever in which the fulcrum has been moved closer to the muscle contraction. This results in:

13. Name the lever:

14. 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?

15. 2nd class levers ALWAYS favor:

16. 3rd class levers mostly favor force or speed?

17. 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?

18. 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?

19. 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.

20. What is the most common type of lever in the human body?

21. Is more force allocated to stabilizing the elbow or to flexing the elbow when the brachialis contracts at a lower degree of flexion

22. Is this a 2nd or 3rd class lever?

23. 2nd class levers are very common in the human body. True or false?

24. This is a 2nd class lever. When comparing this to the human body, the effort is equivalent to:

25. Which of the three forces that make up the muscular force is responsible for stabilizing the joint?

26. The most efficient joint angle to use the brachialis is at

27. The force of the brachialis is shared between which two elements?

28. In the human being which of the following can be regarded as the load?

29. At 30 degrees of flexion what are the three subcomponents of muscle forces

1.
Does this lever favor speed or force?

5.

Increasing the distance of the long vector by increasing the weight of the ball and thus moving the center of gravity will result in:

8. 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)

10.
What is this lever?

11.
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?

12.
This is a first class lever in which the fulcrum has been moved closer to the muscle contraction. This results in:

13.
Name the lever:

22.

Is this a 2nd or 3rd class lever?

24.

This is a 2nd class lever. When comparing this to the human body, the effort is equivalent to:

28.

In the human being which of the following can be regarded as the load?