Week 6

Question 1

whats a synovial joint?

Answer 1

a synovial joint is the most common type of joint in the body. it allows for wide range of motion.

Question 2

what is the articular capsule?

Answer 2

it has the synovial membrane and the fibrous layer.
fibrous layer: outer layer.
synovial membrane: inner layer producing synovial fluid lubricating the joint and reduces friction.

Question 3

synovial cavity?

Answer 3

fluid filled space in which the articulating surfaces of the bones contact each other.

Question 4

articular cartilage?

Answer 4

thin layer of cartilage covering epiphysis. reducing friction and shock absorber

Question 5

ligament?

Answer 5

strong bands of connective tissue that hold the bones at a moveable joint together

Question 6

synovial fluid?

Answer 6

thick lubricating fluid that fills the interior of the joint cavity.

Question 7

menisci?

Answer 7

fibrocartilage structure found between the bones of some synovial joints. provides padding or smooths movements between the bones

Question 8

whats a hinge joint?

Answer 8

elbow joint knee joint

Question 9

ball and socket joint?

Answer 9

shoulder joint and hip joint

Question 10

pivot joint?

Answer 10

atlantoaxial joint or radioulnar joint

Question 11

what is antagonistic muscle pair?

Answer 11

when one muscle contracts the other muscle relaxes.
- when flexing arm, the bicep brachii contracts to flex the elbow and the tricep brachii relaxes to allow the movement but when extending the arm the tricep brachii contract and the bicep brachii relaxes

Question 12

extension of the leg at the knee joint?

Answer 12

rectus femoris

Question 13

flexion of the leg at the knee joint?

Answer 13

biceps femoris

Question 14

Extension of the thigh at the hip joint

Answer 14

vastus medialis

Question 15

Flexion of the cervical portion of the vertebral column

Answer 15

sternocleidomastoid

Question 16

Flexion of vertebral column in the lumbar area

Answer 16

rectus abdominus

Question 17

Abduction of the humerus at the shoulder joint

Answer 17

triceps brachii

Question 18

Internal (medial) rotation of the humerus at the shoulder joint.

Answer 18

deltoid

Question 19

Extension of the vertebral column

Answer 19

semispinalis

Question 20

Dorsiflexion of foot at the ankle joint (dorsiflexion refers to bending at the ankle
and pointing the toes upwards towards the superior surface of the foot)

Answer 20

tibialis

Question 21

Plantar flexes foot at the ankle joint (plantar flexion refers to bending at the ankle
and pointing the toes downwards towards the inferior surface of the foot)

Answer 21

gastrocnemius