Asked Feb 10, 2019
3 Answering the telephone
Joints moving:
Motions occurring:
+ Jumping rope
Joints moving
Motions occurring:
Articulations UNI

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3 Answering the telephone Joints moving: Motions occurring: + Jumping rope Joints moving Motions occurring: Articulations UNI


Expert Answer

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Step 1

Locomotion, in case of human beings, is brought about by coordinated movements of bones. These bones are connected to each other by joints and can carry out movement with the help of muscles.

Muscles can pull the bones but cannot push them. So, for all types of movements to occur, these muscles act as pair of flexors and extensors. Flexors when contract cause pulling effect while when they relax, the extensors contract and contract to push the bones back to original position.

Step 2

Bones are connected to each other in whole of the skeleton. These connections are called joints. For the movement to occur, there is coordinated movement of various joints.

To answer a phone call, various joints are involved. These are tabulated as:



carpal joints (present in wrist), metacarpal joints (present in palm)  and

phalangeal joints (present in fingers)

Picking up the receiver of the phone (Flexor)

Elbow joint (composed of hinge joint between humerus and radio-ulna)

Taking receiver towards ear (Flexor and rotation)

Shoulder joint (ball and socket joint between humerus and clavicle)

Keeping the receiver (Flexor)

Mandibular joint

For speaking

Step 3

Joints moving while skipping rope:



Shoulder joint (ball and socket joint between humerus and clavicle)

Rotation of arms

Carpel joints (present in wrist)

Movement of wrist (Rotation for moving the rope ends)

Hip and knee joint (both ball and socket)

Extension of legs

Ankle joint

For ank...

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