Soc 14- 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 muscle

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

Deltoid

Answer 4

Move the arm in all directions at the shoulder

Question 5

Pectoralis major

Answer 5

Adduct the arm at the shoulder

Question 6

Latissimus dorsi

Answer 6

Adduct and extend the arm at the shoulder

Question 7

Biceps

Answer 7

Flex the arm at the elbow

Question 8

Triceps

Answer 8

Extend the arm at the elbow

Question 9

External obliques

Answer 9

Adduct and extend leg at the hips, pull leg backwards

Question 10

Gluteals

Answer 10

Chest downwards flex rotate spinal column

Question 11

Hip flexors

Answer 11

Flex the hip helps move leg and knee towards body

Question 12

Quadriceps

Answer 12

Extend the leg at the knee

Question 13

Hamstrings

Answer 13

Flex the leg at the knee

Question 14

Gastrocnemius

Answer 14

Point the toes, help flex the knee

Question 15

Tibialis anterior

Answer 15

Pull the toes towards the shin

Question 16

Muscle fibres

Answer 16

make up voluntary
(skeletal) muscle; divided into
type I, type lla and type lIx.

Question 17

Type I

Answer 17

slow twitch muscle fibres; suited to low intensity work, e.g. marathon running, as they can be used for a long period without fatiguing.

Question 18

Type IIa

Answer 18

fast twitch muscle fibres used in anaerobic work; can be improved through endurance training to increase their resistance to fatigue.

Question 19

Type IIx

Answer 19

fast twitch muscle fibres used in anaerobic work and can generate much greater force than other fibre types, but fatigue quickly.

Question 20

Myoglobin

Answer 20

A red pigment that transports oxygen to the muscles

Question 21

Antagonistic pair

Answer 21

muscles that work together to create movement.