Topic 6 Flashcards
You will be introduced to the three muscle types: skeletal, cardiac and smooth. The histology of muscle will be considered, and the specialisation of muscle fibres for the function of contraction will be explained.
What are the three recognizable muscular tissues?
Skeletal, cardiac and smooth.
What are the 5 key functions of the muscle tissue?
Body movement Regulating organ volume Producing heat Movement of substances Stabilizing body positions
What neuron is responsoble for transmitting a nerve impulse to a skeletal muscle?
Motor neuron
What kind of filiament is the thick filament found in a skeletal muscle called?
Myosin
What kind of filiament is the thin filament found in a skeletal muscle called?
Actin
What separates the sacromeres together?
Z discs
What filaments are present in a H zone?
Thin (actin) filaments
Thin filaments are made of 3 things, what are they?
Actin, troponin, tropomyosin
What happens to the filaments during a muscle contraction?
Myosin head binds to actin sites. I bands and H zones become narrower and the sliding generates force and shortens sacromeres.
What are connective tissues components of a skeletal muscle tissue?
Epimysium, Perimysium, Endomysium, Fascicules and Fasciae.
What is the sarcolemma?
A sarcolemma is a cell membrane surrounding a skeletal muscle fibre. It contains sarcoplasm.
What is the Neuromuscular Junction(NMJ)?
Point where the motor neuron and the muscle sarcolemma meet.
What kind of neurotransmitter is released at the neuromuscular junction?
Acetylcholine
