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Quiz 155
Mdcat-past-papers Quiz
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3081. Which feature is possessed by smooth muscles?
Voluntary
Branched
Uni-nucleate
Striated appearance
3082. The accumulation of 'lactic acid' in the muscles results in :
Extreme fatigue
Muscle contraction
Paralysis
Convulsion
3083. Thick filaments in skeletal muscles are composed of :
Actin
Myosin
Tropomyosin
Troponin
3084. Sarcomeres is part of myofibril between :
Two I bands
Two A bands
Two M lines
Two Z lines
3085. Each myosin is surrounded by:
Motor nerves
Myosin Head
6-actin filaments
2 Actin Filaments
3086. This muscle controls the diameter of blood vessels:
Smooth
Striated
Cardiac
Skeletal
3087. The muscle contraction involves the breakdown of cross bridges of actin and myosin filaments due to the following process:
ATP is oxidized
ATP is reduced
ATP is hydrolyzed
ATP is synthesized
3088. What is the function of myoglobin?
Store oxygen
Store CO2
Transport oxygen
Transport CO2
3089. Which feature is possessed by smooth muscles?
Multinucleate cells
contractile sarcomeres
Uninucleate cells
Striated appearance
3090. What do we call the cell membrane of a muscle fibre?
sarcolemma
Plasma membrane
Sarcoplasm
Myofibrils
3091. Contractile unit between two Z lines is absent in:
Skeletal muscles
Skeletal and cardiac muscles
Smooth muscles
skeletal muscles and smooth muscles
3092. Sequence of nerve impulse initiation leading to muscle contraction:
3,1,2,4
1,2,3,4
4,2,3,1
2,3,4,1
3093. Which one of the following muscles are considered as Voluntary Muscles?
Smooth muscles
Cardiac muscles
Skeletal muscles
Glandular muscles
3094. What do we call the cell surface membrane of a muscle fibre?
Sarcolemma
Plasma membrane
Sarcoplasm
Myofibrils
3095. The hollow elongated tube formed when muscle fiber penetrates deep into the cell is known as:
A tubule
T tubule
M tubule
Z tubule
3096. How many actin filaments surround the myosin at each end?
2
4
6
8
3097. The ........ surrounds the muscle fiber of the skeletal muscle.
Cytoplasm
Myofibrils
Lacuna-
Sarcoplasm
3098. What happens to calcium when skeletal muscles recover from contraction?
Released from the sarcoplasmic reticulum
Released from the myosin head
Pumped into the sarcoplasmic reticulum
Exchange for sodium ions
3099. Which of the following does not relate to the smooth muscles?
Controlled by the autonomic nervous system
Have spindle shaped cells
Line the wall of heart
Lack striations
3100. Which of the following muscles are considered as "voluntary muscles"?
Smooth Muscles
Cardiac muscles
skeletal muscles
Glandular Muscles
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