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Biomedicine > Musculoskeletal System 3 > Flashcards

Musculoskeletal System 3 Flashcards

1
Q

4 Functions of the musculoskeletal system

A

Movement
Heat
Posture
Storage
Movement of substances

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2
Q

What does excitability mean?

A

Conduct electric current

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3
Q

What does contractability mean

A

Ability to shorten

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4
Q

What does extensibility mean

A

Ability to stretch

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5
Q

What does elasticity mean

A

Spring

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6
Q

Difference between striated and non-striated

A

Striated - parrelel bundles
Non-striated - randomly arranged

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7
Q

Characters of skeletal muscles

A

Striated
Voluntary
Attachment

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8
Q

Characteristics of cardiac muscle

A

Striated
Involuntary
Auto-rhythmic

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9
Q

Characteristics of smooth muscle

A

Non-striated
Involuntary
Found in walls of blood vessels
Iris
Gut

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10
Q

2 functions of skeletal muscle

A

Attaches between bones
Creates movement between joints

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11
Q

Role of fascia

A

Organises muscles
Secures them to the skin
Provides stability
Mostly made of collagen

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12
Q

What are myocytes?

A

Long cells that make up skeletal muscles

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13
Q

How many skeletal muscles in the body?

A

640

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14
Q

What is the function of sarcomella?

A

Membrane of skeletal muscle fibre

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15
Q

Tubes extending from muscle into cell

A

Transverse tubules

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16
Q

Muscle cell cytoplasm

A

Sarcoplasm

17
Q

Sarcoplasmic reticulum function

A

Stores calcium needed for muscle contraction

18
Q

Myoglobin function

A

Iron and oxygen binding protein

19
Q

Why are mitochondria close to the myoglobin?

A

For aerobic respiration

20
Q

Why are we born with a set number of skeletal muscle cells?

A

Once mature muscle cells are forms myocytes then can no longer under go mitosis.

21
Q

Define myofibrils

A

Cylindrical structures formed of bundles of protein filaments within the muscle fibre.

22
Q

Describe the to myofilaments that make up the myobrils

A

Actin - thin filaments
Myosin - thick filaments with golf club shaped heads

23
Q

What is meant by sarcomeres?

A

Biomedicine (20 decks)

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