Biology Fsc Part 1 Chapter 12 Online Test With Answers

Biology Fsc Part 1 Chapter 12 Online Test

Sr. # Questions Answers Choice
1 The 2nd step of sliding filament model is. Sarcomerse at relaxed state Arrival of nerve impulse Cross bridges and power stroke Separationof myosin heads
2 Sliding filaments model explains. Physiology of muscle contraction Compositon of muscle fibre  Stiffening of muscles after death levels of organization of muscles
3 When a nerve impulse reaches sarcolemma.....is released by motor neuron a synapse. Acetylcholine Ca++ ATP Dopamine
4 Twisted strand of pearls is the characteristic of. Actin Myosin Troponin Tropomyosin
5 the protin standwhcih wrap about active core and stiffen it is. Myosin Tropomyosin G-protein Troponin
6 Thin myofilaments are about ............in diameter 7-8 nm 1-2 micro metre 100 micro metre 16 nm
7 Thick myofilametsare about ...in diameter. 16 nm 1-2 micro metre 7-8 nm 1-2 nm
8 The thin filaments overlap with thick filaments whihc creates. A- Band Z- line H- Band I- Band
9 Thereare........types ofmyofilaments 2 18 100 25
10 The smallest unit of muscle contraction is called Sarcomere Sarcoplasmic reticullum Sareoplasm I-Band
11 The thin active filametns are attached to protein discs called. Z-line M-Line H-Zone A-band
12 The thick myofilaments create A Band I-Band Z- Band H-Band
13 Each muscle fibre contains elongated thread like structures called myofibrils 4 to 20 4 to 10 2 to 4 4 to 10
14 Sarcolemma is Cytoplasm of skeletal muscle fibre Endoplasmic reticulum of muscle fibre Plasma membrane of myocyte  Sacomere
15 the collagen fibres and connective tissue which sttach the muscle to done are. Ligaments Tendons Fascia Chords
16 The commonality between skeletal muscles and cardiac muscles. Strips  One nucleus Voluntary control Movement of skeleton 
17 Un-stripped, spindle shapd, one nucleus per cell are teh charcteristics of. Cardiac muscle Smooth muscle Skeletal muscle Voluntary muscles
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