What is the cell membrane called for muscle fibres
Sarcolemma
22 of 44
What is the cytosol called for muscle cells and covers the myofibril?
Sarcoplasmic Reticulum (SR)
23 of 44
What 2 things that the sarcoplasm contains and what are they for?
Glycogen - synthesis of ATP; Myoglobin - bind O2 to muscle and release O2 to Mitochondria
24 of 44
Where would you find the T-tubules?
Sarcolemma
25 of 44
What protein is the thick filament made from?
Myosin
26 of 44
What 3 proteins are the thin filaments made from?
Actin; Tropomyosin; Troponin
27 of 44
What is the name of the section from T-tubule to T-tubule
Sarcomere
28 of 44
What part of the cell is responsible for contraction?
Myofibrils
29 of 44
Where is Ca2+ stored?
Terminal cisterns
30 of 44
What word is given to 1 T-tubule and 2 terminal cisterns?
Triad
31 of 44
What is the name of the dense protein that separates the sarcomeres?
Z-Discs
32 of 44
What are the 3 types of proteins needed for a contraction?
Contractile; Regulatory; Structural
33 of 44
Name the contractile proteins and their functions:
Myosin + Actin - to generate force
34 of 44
Name the regulator proteins and their functions:
Tropomyosin + Troponin - turn contractions on or off
35 of 44
Which filaments/protein has a myosin binding site?
Thin/Actin
36 of 44
Which filament/protein is known as the major motor protein and uses ATP?
Thick/Myosin
37 of 44
Which filament/protein covers the myosin binding sites when relaxed?
Thin/Tropomyosin
38 of 44
Which filament/protein changes shape when Ca2+ binds to it?
Thin/Troponin
39 of 44
What neurotransmitter is released at the neuromuscular junction?
Acetylcholine (ACh)
40 of 44
How is the acetylcholine ACh broken down?
Acetycholinesterase
41 of 44
What are the 3 types of skeletal muscle fibres?
Slow Oxidative (SO); Fast Glycolytic (FG); Fast Oxidative-Glycolytice
42 of 44
What are the 6 properties of Slow Oxidative (SO) fibres?
Small least powerful; Dark red increase myoglobin; Mitrochondria = ATP aerobic respiration; Respiration takes longer; Ideal for endurance; Fatigue resistant
43 of 44
What are the 6 properties of Fast Glycolytic (FG) fibres?
Largest increase myofibrils; More powerful; White decrease myoglobin; Glycogen = ATP = glycolosis; Hydrolyse ATP fast; Fatigue quickly = Anaerobic respiration; Ideal for strength training
Comments
No comments have yet been made