7.1 Getting moving

Question 1

What do muscles bring about the movement of?

Answer 1

Joints

Question 2

what are the type of pairs that muscles work in called?

Answer 2

Antagonistic

Question 3

what is the muscle that contracts to cause extension of a joint called?

Answer 3

An extensor

Question 4

what is a corresponding muscle to the extensor?

Answer 4

The flexor

Question 5

The hip, knee and ankle joints are example of what kind of joints?

Answer 5

Synovial joints

Question 6

what holds bones together?

Answer 6

Ligaments

Question 7

what attaches muscles to bones?

Answer 7

Tendons

Question 8

What is the role of cartilage between bones?

Answer 8

absorbs synovial fluid and acts as a shock absorber

Question 9

what is found in each muscle fibre?

Answer 9

mitochondria, other organelles and numerous myofibrils which are each composed of repeated contractile units called sarcomeres

Question 10

what are the two types of protein molecules that make up the sarcomere?

Answer 10

actin and myosin

Question 11

out of actin and myosin, which is thick and which is thin?

Answer 11

Actin is thin and myosin is thick

Question 12

what two molecules is actin associated with?

Answer 12

Troponin and tropomyosin