Font size
WorksheetsAnatomy and Physiology of the Muscular System
Total questions: 21
Worksheet time: 11mins
What are the 4 muscle functions?
movement
posture
stability
heat
extensibility
which type of fibre arrangement is this?
Long, parallel, strap-like; Cover long distances
(a)
pennate fibres are what?
Fan-shaped; Converge at insertion
Short; Many fibres per unit area
Circular fibre bands; Surround body openings
origin fibres attach to which type of bone?
immovable bone
movable bone
the primer mover fibre does what?
Provides major force for movement
Adds force to action
Opposes movement
Immobilises bones
which type of fibre adds force to action of the prime mover
synergist
antagonist
fixator
muscles can only ever
pull, never push
push, never pull
Levers are rigid bars that do what?
moves on a fixed point
Applies force to move a resistance
Opposes movement
Effort and Load opposite; Fulcrum in between - is which lever?
first class
second class
third class
What is the order from outer to inner muscle layers?
epi, peri, endo (...mysium)
endo, epi, peri (...mysium)
peri, endo, epi (...mysium)
Fascicles are formed by bundled muscle fibres
true
false
Muscle fibres are supplied with motor units for contractibility
true
false
the blood supply in the muscle has the function of removing waste and ATP, and delivering oxygen
true
false
Two polypeptide chains, two globular heads
This forms a myosin molecule
Heads contain ATP binding sites
contain 200 myosin molecules
thick filament
thin filament
Globular proteins linked into chains
These form actin molecule
Strengthened by tropomyosin protein strands
Contains myosin bindings sites (troponin)
thick filament
thin filament
Which of the following are classified sarcomere regions
A band
H zone
M line
I band
Z disc
What occurs at the neuromuscular junction?
synaptic cleft binds motor neurons to muscle tissue
Motor neuron binds to muscle tissue
Ca2+ causes vesicles to release TSH
TSH travels across neuromuscular junction
the Sarcoplasmic Reticulum is a network surrounding each myofilament
true
false
the terminal cisternae are?
Longitudinal cross channels
Elongated tubes entering cell depths
When Ca2+ levels are low, tropomyosin ‘blocks’ actin binding sites. When Ca2+ levels increase, they bind to troponin causing shape change. Tropomyosin moves away from site and binding sites free for myosin.
this is the role of what?
acetylcholine
troponin complex
ionic calcium
tropomyosin
Which is the correct sliding filament model process?
- cross bridge detachment
- cocking of myosin
- cross bridge attachment
- power stroke
- cross bridge attachment
- power stroke
- cross bridge detachment
- cocking of myosin
- cocking of myosin
- cross bridge detachment
- power stroke
- cross bridge attachment
