Soc 14

Question 1

Antagonistic pairs

Answer 1

Muscles that work together to create a movement

Question 2

Agonistic pair

Answer 2

The other relaxes

Question 3

Antagonistic pair

Answer 3

To allow the joint to work

Question 4

Name the 4 antagonistic pairs and their locations

Answer 4

Biceps/Triceps (elbow)
Hamstrings/Quadriceps (knee)
Gastronemius/Tibialis anterior (ankle)
Gluteals/Hip flexors (hip)

Question 6

Muscle fibres can be of two main types:

Answer 6

Slow twitch (type I) and Fast twitch (type II)

Question 7

Slow twitch (type I)

Answer 7

Suit endurance activities - can work for long periods of time.

• They’re darker in colour because they contain Myoglobin, a red pigment that transports oxygen to
  the working muscles.

Question 8

Fast twitch (type II) - can be broken down into two further types:

Answer 8

Type IIa and Type IIx

Question 9

Type IIa

Answer 9

used in anaerobic work which can be improved through endurance training. Increase their
resistance to fatigue

Question 10

Type IIx

Answer 10

• used in anaerobic work than can generate more power that other muscle fibres but fatigue
  quickly.
• Suit speed events, such as sprinting or jumping (type IIa and type IIx) are lighter in colour because
  they don’t use oxygen for energy.

Question 11

How can different type of muscle fibres affect our sport?

Answer 11

We all have both types of fibre in our muscle but in different quantities, probably determined by our genes - and this may affect what sports we are ‘naturally’ good at.

Question 12

Myoglobin:

Answer 12

A red pigment that transports oxygen to the muscles.