Levers and Joints: Master the Mechanics of Human Movement

Question 1

Which type of lever is exemplified by a seesaw where the fulcrum is positioned in the middle, with the effort and resistance applied on opposite sides?

Accepted Answer

First class

Answer

Second class

Answer

Third class

Question 2

What type of joint permits movement only in the sagittal plane, allowing for bending and straightening?

Accepted Answer

Hinge joint

Answer

Ball-and-socket joint

Answer

Saddle joint

Question 3

What is the primary function of the deltoid ligament in the shoulder joint?

Accepted Answer

Prevents dislocation

Answer

Limits abduction

Answer

Stabilizes the joint capsule

Question 4

What is the specific movement where the sole of the foot turns inward and outward?

Accepted Answer

Inversion and eversion

Answer

Supination and pronation

Answer

Dorsiflexion and plantarflexion

Question 5

Which joint type allows for the widest range of motion, including rotation, flexion, and extension?

Accepted Answer

Ball-and-socket joint

Answer

Pivot joint

Answer

Saddle joint

Question 6

Which of the following joints allows movement in only one plane, making it a uniaxial joint?

Accepted Answer

Elbow joint

Answer

Shoulder joint

Answer

Knee joint

Answer

Hip joint

Question 7

The force applied to a lever to produce movement is referred to as:

Accepted Answer

Effort

Answer

Fulcrum

Answer

Resistance

Answer

Moment arm

Question 8

Which of the following is a primary function of synovial joints?

Accepted Answer

Only A and C

Answer

Lubricating and reducing friction

Answer

Allowing a wide range of motion

Answer

Absorbing shock

Question 9

The movement of a joint towards the midline of the body is known as:

Accepted Answer

Flexion

Answer

Extension

Answer

Abduction

Answer

Adduction

Question 10

In the forearm, where the effort is applied between the fulcrum and resistance, the type of lever present is a:

Accepted Answer

Second-class lever

Answer

First-class lever

Answer

Third-class lever

Question 11

The force acting against the movement of a lever, typically the weight or resistance, is known as:

Accepted Answer

Resistance

Answer

Fulcrum

Answer

Effort

Answer

Moment arm

Question 12

The shoulder joint is an example of a:

Accepted Answer

Ball-and-socket joint

Answer

Saddle joint

Answer

Condyloid joint

Question 13

Which type of joint provides the greatest freedom of movement, allowing for rotations and movements in multiple directions?

Accepted Answer

Ball-and-socket joint

Answer

Hinge joint

Answer

Pivot joint

Question 14

Which muscle is primarily responsible for bending the elbow at the joint?

Accepted Answer

Biceps brachii

Answer

Triceps brachii

Answer

Brachialis

Question 15

What is the primary function of ligaments in joints?

Accepted Answer

To provide stability and connect bones

Answer

To enable smooth movement

Answer

To regulate joint temperature

Question 16

Which muscle group plays a key role in extending the knee joint?

Accepted Answer

Quadriceps muscle group

Answer

Hamstring muscle group

Answer

Calf muscle group

Question 17

Which plane of movement divides the body into left and right halves, allowing for movements like side bends and twists?

Accepted Answer

Frontal plane

Answer

Sagittal plane

Answer

Transverse plane

Question 18

What is the main advantage of a third-class lever in biomechanics?

Accepted Answer

Increased range of motion

Answer

Increased force

Answer

Increased speed

Question 19

In a lever system, what is the term for the fixed point around which the lever pivots?

Accepted Answer

Fulcrum

Answer

Effort

Answer

Resistance

Answer

Load

Question 20

Which of the following examples best illustrates a second-class lever system in human movement?

Accepted Answer

Raising up onto your toes while standing

Answer

Bending your elbow to lift a weight

Answer

Kicking a football

Answer

Extending your knee in a seated position

Question 21

Which type of joint allows for the greatest diversity of movements, including rotation and angular motion?

Accepted Answer

Ball and Socket Joint

Answer

Hinge Joint

Answer

Saddle Joint

Answer

Pivot Joint

Question 22

What is the primary function of ligaments in the human body?

Accepted Answer

Connecting bones to bones, providing stability to joints

Answer

Connecting muscles to bones

Answer

Providing cushioning between bones

Answer

Facilitating movement

Question 23

Which of the following actions primarily employs a hinge joint?

Accepted Answer

Extending the knee

Answer

Bending the wrist side to side

Answer

Pointing your toes

Answer

Rotating the shoulder

Question 24

What is the primary role of cartilage in a joint?

Accepted Answer

Reducing friction and absorbing shock to protect the joint

Answer

Connecting muscles to bones

Answer

Limiting the range of motion

Answer

Increasing joint stability

Question 25

Identify the type of lever system exemplified by the elbow joint during arm flexion and extension.

Accepted Answer

Third Class

Answer

None of the above

Answer

First Class

Answer

Second Class

Question 26

Which type of joint allows for rotary motion around a single axis?

Accepted Answer

Pivot Joint

Answer

Hinge Joint

Answer

Saddle Joint

Answer

Ball and Socket Joint