Soc 14 The Muscular System

Question 1

Define Muscle Fibres

Answer 1

Make up voluntary (skeletal) muscle; divided into type 1, type lla and type llx.

Question 2

What is type 1 muscles fibres

Answer 2

Slow twitch muscle fibres suited to low intensity work.

An example is marathon runner, as they can be used for a long period of time without fatiguing.

Question 3

What are type lla muscle fibres?

Answer 3

Fast twitch muscle fibres used in anaerobic work .

They can be improved through endurance training to increase their resistance to fatigue.

Question 4

What are type IIx muscle fibres

Answer 4

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

Question 5

What is a myoglobin muscle fibre

Answer 5

A red pigment that transports oxygen to the muscles.

Question 6

Location and function of the gluteals?

Answer 6

Location:
In the middle of the body at the back forming the bottom.

Function:
To aduct and extend the leg at the hips, pull the leg backwards.

Question 7

Function and location of the hamstring

Answer 7

Location:
At the top of each leg at the back

Function:
Flex the leg at the knees.

Question 8

Location and function of the gastrocnemius

Answer 8

Location:
At the bottom of each leg at the back. Also known as the calf muscles.

Function:
Point the toes (planta flexion) at the ankle.

Question 9

Where is the lattimuss dorsi located and how does it function.

Answer 9

Location:
At the back of the body, either side of the chest.

Function:
Pull your arms down at the shoulders and behind your back (adduct and extend).

Question 10

Location and function of triceps

Answer 10

Location: At the top of each arm at the back.

Function: Extend the arm at the elbow.

Question 11

Function and location of deltoids

Answer 11

Location:
In the upper part of the body, covering the shoulders.

Function:
To raise the arms in all directions at the shoulders.

Question 12

Function and location of biceps

Answer 12

Location:
In the upper part of the body, covering the shoulders.

Function:
Raise the arms in all directions at the shoulders.

Question 13

Function and location of the quadriceps

Answer 13

Location:
At the top of each leg at the front

Function:
Extend the leg at the knee.

Question 14

Function and location of the pectorialis major

Answer 14

Location:
In the upper part of the chest at the front.

Function:
Adduct the arm at the shoulder.

Question 15

Location and function of the external obliques

Answer 15

Location:
To the side of the abdomen

Function:
Pull the chest downwards. Flex and rotate the spinal column.

Question 16

Function and location of the tibialis anterior

Answer 16

Location:
runs down the skin

Function:
Pull the toes up towards the shin (dorsi flexion)

Question 17

Function and location of hip flexors

Answer 17

Location:
Sit deep in the front of the hip and connect to the leg.

Function:
Flex the hip, help the leg and knee up towards the body.