GCSE PE: 1A Applied anatomy and physiology

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38 Terms

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flexors

the muscles which bend a limb at a joint by contracting eg bicep

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prime movers - agonist

the main muscle which contracts to produce the movement (i.e. bicep when bending the arm)

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abductors

muscles which move a limb towards the body - deltoid

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extensors

the muscles which work against the flexors + straighten a limb at a joint by contracting - tricep

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adductors

the muscles which move a limb towards the body - latissimus dorsi

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antagonists

the muscle which works against the agonist and relax to allow the movement to take place (i.e. tricep when bending the arm)

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cartilage

shock absorber, stops bones rubbing together/wearing away e.g. meniscus (between the tibia and femur at the knee joint).

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ligaments

attach bone to bone, have to be strong/elastic, keep joints stable e.g. cruciate ligament

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tendons

attach muscle to bone, strong/non-elastic e.g. achilles tendon

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functions of the skeleton

-structure and support

-protection of vital organs

-movement

-mineral storage

-blood cell production

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types of bones

long, short, flat and irregular

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What are short bones?

Bones that help with gripping, balancing, and fine movements.

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Give examples of short bones.

Carpals and tarsals

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What are long bones?

These bones are used in most of our movements like running and throwing.

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Long bone examples

femur, humerus, radius, ulna, tibia, fibula

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What are flat bones?

These bones are very important for protection

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Flat bone examples

cranium, ribs, sternum, scapula

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What are irregular bones?

Irregular shape bones found in the face and spine

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Irregular bone examples

Vertebrae, jawbone, cheekbone

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Synovial joints

joints filled with fluid that surrounds cartilage attached at the end of each of the bones that meet at the joint

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6 types of joint

-Pivot

-Hinge

-Ball and socket

-gliding

-Saddle

-condyloid (Ellipsoid)

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Ligaments

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Synovial fluid

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Bursae

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Tendons

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Ball and socket joint

most moveable joint, turns in many directions

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hips, shoulder

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hinge

bone can swing back and forward (like a door hinge)

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knee, elbow

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pivot

only allows rotation

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neck (atlas + axis), joint between radius + ulna (elbow)

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extension

increase angle of joint

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flexion

decrease angle of joint

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abduction

Movement away from the midline of the body

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adduction

Movement toward the midline of the body

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plantar flexion

pointing toes towards the ground

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dorsiflexion

pointing toes toward the sky

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rotation

movement of the joint at 360 degrees