Muscle tissue
Quiz by Gjini, Dr. Anita
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- Q1
The Z discs
It is where the thick and thin filaments overlap
Are part of dark band
Create the boundaries of the sarcomere
Hold the adjacent thick filaments together
45s - Q2
This muscle structure/component runs the entire length of an A band
Thick filaments
Z disc
Thin filaments
M line
45s - Q3
During cross bridge cycle myosin head pivots and pulls thin filaments towars
Z discs
A band
M line
I band
45s - Q4
During concentric (isotonic) contraction
The tension of fibers increase
The muscle shortens
The muscle lengthens
The muscle does not change its length
45s - Q5
ATP is needed to detach the cross-bridge
truefalseTrue or False45s - Q6
Thick filaments are composed of a contractile protein called _________
Myosin
Troponin
Actin
Tropomyosin
45s - Q7
This part of skeletal muscle cell releases calcium when stimulated by the T-tubules
Myofibrils
Sarcolemma
Sarcoplasm
Sarcoplasmic reticulum
45s - Q8
A cross-bridge is formed between _____ & ______
Myosin heads & myosin binding sites on actin filaments
Troponin & myosin binding sites on actin filaments
Myosin heads & troponin
Myosin heads and tropomyosin
45s - Q9
Rigor mortis occurs because of an excessive amount of ATP in the srcoplasm
falsetrueTrue or False30s - Q10
The smallest structural and functional unit of skeletal muscle cell is __________
Sarcolemma
Myofibril
Sarcomere
H-zone
30s - Q11
Pushing against the wall in an attempt to move it is an example of _________ contraction
Isotonic concentric
Isometric
Isotonic eccentric
45s - Q12
Each muscle fiber is enclosed in connective tissue sheath called _________
Fascicle
Perimysium
Endomysium
Epimysium
45s - Q13
Which statement below best describes step "X" :
A power stroke ccurs --> X --> Cross bridges detach
Calcium binds to troponin
Z- discs get pulled towards the M-line
ACh is released into the synaptic cleft
AP reaches the neuromuscular junction
45s - Q14
Which of the followings is not true regarding the eccentric contraction?
Muscle lengthens
Loads moves
Tension rises
Muscle contracts
30s