Soc14 Muscular System

Question 1

Voluntary muscles

Answer 1

Voluntary muscles are under your control, you can choose when to contract or relax them. All these muscles are attached to the skeleton via tendons. When your muscles contract movement takes place.

Question 2

Involuntary muscles

Answer 2

Involuntary muscles are not under our control, They contract and relax automatically controlled by the involuntary nervous system. They can be found in the digestive organs, circulatory and urinary systems.

Question 3

Cardiac musles

Answer 3

Only found in the wall of the heart it is a very specialised type of involuntary muscle. Cardia muscle is made up of interlaced fibres, These fibres can spread electronical signals from the brain right through the heart so that all the cells can contract together. This regulates your heart rate and means that when you exercise your heart keeps pumping in the right way.

Question 4

What muslces flex the knee?

Answer 4

Hamstring

Question 5

What muslce extends the knee?

Answer 5

Quadriceps

Question 6

What muslce flexes the hip?

Answer 6

Hip flexors

Question 7

What muslce extends the hip?

Answer 7

Gluteals

Question 8

What muscle extends the arm?

Answer 8

Tricep

Question 9

What muscle flexes the elbow?

Answer 9

Bicep

Question 10

What muslce dorsiflexes the ankle?

Answer 10

Tibialis anterior

Question 11

What muscle plantarflexes the ankle?

Answer 11

Gastrocnemius

Question 12

What muslce extends the shoulder?

Answer 12

Deltoid

Question 13

What muscle flexes the shoulder?

Answer 13

Deltoid

Question 14

Function of the deltoids

Answer 14

Move the arm in all directions in a circumductional movement

Question 15

Function of the pectoral major

Answer 15

To adduct the arm at the shoulder

Question 16

Function of the latissimus dorsi

Answer 16

To adduct and extend the arm at the shoulder

Question 17

Function of the bicep

Answer 17

To flex the arm at the elbow

Question 18

Function of the tricep

Answer 18

To extemd the arm at the elbow

Question 19

Function of the external obliques

Answer 19

To flex and rotate the spinal column

Question 20

Function of the gluteals

Answer 20

To adduct and extend the leg at the hips and to pull the leg backwards

Question 21

Function of the hip flexors

Answer 21

To flex the hip, to help move the leg and knee towards the body

Question 22

Function of the quadriceps

Answer 22

To extend the leg at the knee

Question 23

Function of the hamstrings

Answer 23

Flex the leg at the knee

Question 24

Function of the gastrocnemius

Answer 24

Plantar-flexes the ankle (points the toes)

Question 25

Function of the tibialis anterior

Answer 25

Dorsi-flexes the ankle (pulls the toes up)

Question 26

Muscle fibres

Answer 26

Made up of voluntary muscles that are either type l ,type lla and type llx.

Question 27

Type l muscle fibres

Answer 27

Slow twitch muscle fibres that are suited to low intensity work for long periods of time without fatiguing.

Question 28

Type lla muscle twitch fibres

Answer 28

Fast twitch muscle fibres used in anaerobic that fatigue quickly

Question 29

Type llx muscle twitch fibres

Answer 29

Fast twitch muscle fibres used in anaerobic work that generate much greater force than the other fibres but tires fastest aswell

Question 30

Myoglobin

Answer 30

A red pigament that transports oxygen to the muscles

Question 31

Antagonistic pair

Answer 31

Muscles work in pairs. One contracts (agonist) and one relaxes (antagonist) to allow the jojnt to work