Structure of Muscle Part 1

Question 1

What are muscles responsible for?

Answer 1

All movement of the body

Question 2

What are the 3 basic types of muscle?

Answer 2

• skeletal
• cardiac
• smooth

Question 3

Where is skeletal muscle found?

Answer 3

Limbs
- inc all voluntary muscle / muscles you can control

Question 4

Where is cardiac muscle found?

Answer 4

Heart

Question 5

Where is smooth muscle found?

Answer 5

Viscera

Question 6

Describe the structure of skeletal muscle

Answer 6

• striated
• multi-nucleated
• body energy converters

Question 7

Describe the structure of cardiac muscle

Answer 7

• striated
• 1 nucleus

Question 8

Are skeletal muscles voluntary or involuntary?

Answer 8

Voluntary

Question 9

Are cardiac muscles voluntary or involuntary?

Answer 9

Involuntary, automatic

Question 10

Are smooth muscles voluntary or involuntary?

Answer 10

Involuntary

Question 11

What are properties of muscle?

Answer 11

• excitability (responsiveness)
• contractility
• extensibility
• elasticity (recoil)

Question 12

What are the functions of the skeletal muscles?

Answer 12

• movement
• maintenance of posture & body position
• heat production & store nutrient reserves
• protects bones & internal organs

Question 13

What 2 terms about fibres are used interchangeably?

Answer 13

Muscle cell and muscle fibre

Question 14

How long does a muscle fibre extend?

Answer 14

Each muscle fibre extends from one end of the muscle to the other end.

Question 15

List the organisation of the skeletal muscle from the outside inwards.

Answer 15

• epimysium
• perimysium
• endomysium
• fascicle
• muscle fiber

Question 16

What is the epimysium?

Answer 16

• layer of collagen fibres surrounding the muscle
• connected to deep fascia
• separates muscle from surrounding tissues

Question 17

What is the perimysium?

Answer 17

Surrounds fascicles
Contains:
- collagen fibres
- elastic fibres
- blood vessels
- nerves

Question 18

What is the endomysium?

Answer 18

Surrounds individual muscle cells
Contains:
- capillary networks
- myosatellite cells (stem cells that repair damage)
- nerve fibre

Question 19

What do the collagen fibres of the epimysium,
perimysium and endomysium form?

Answer 19

Come together at base of muscles to form:
- tendon (bundle of fibres) connected to the bone
- aponeurosis (sheet of fibres)

Question 20

Why do the collagen fibres of the epimysium,
perimysium and endomysium come together?

Answer 20

To attach skeletal muscles to bones