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BIO-210 Exam 3 Assessment Questions And Answers 100% Verified.

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  • BIO 210
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  • BIO 210

5 characteristics of muscle - correct answer 1. Responsiveness 2. Conductivity 3. Contractibility 4. Extensibility 5. Elasticity 2 names for muscle fiber - correct answer 1. myofiber 2. myocyte ...

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  • August 9, 2024
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  • Exam (elaborations)
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  • BIO 210
  • BIO 210
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BIO-210 Exam 3

5 characteristics of muscle - correct answer 1. Responsiveness

2. Conductivity

3. Contractibility

4. Extensibility

5. Elasticity



2 names for muscle fiber - correct answer 1. myofiber

2. myocyte



Muscle cells are packed full of which type of protein filament? - correct answer
myofibrils: bundles of protein filaments (actin and myosin)



Difference between myofiber and myofibril - correct answer Myofiber: a
muscle fiber

Myofibril: protein filaments within the cytoplasm of the muscle cell



Muscle cytoplasm (name and significance) - correct answer Sarcoplasm:
contains glycogen and mitochondria to provide energy for contraction and myoglobin for binding oxygen



Muscle cell membrane (name) - correct answer Sarcolemma



T-tubules (location and function) - correct answer conducts action potential to
open calcium channels on sarcoplasmic reticulum



Sarcoplasmic reticulum (location and function) - correct answer stores calcium

,Terminal cisternae (location and function) - correct answer dilated end-sacs;
store calcium



What is a "triad" referring to? - correct answer a triad consists of 1 transverse
tubule and 2 terminal cisternae



3 Connective tissue wrappings of skeletal muscle - correct answer 1.
Endomysium

2. Perimysium

3. Epimysium



Endomysium - correct answer around single muscle fiber; can repair damage
with satellite (stem) cells



Perimysium - correct answer around a fascicle (bundle) of fibers



Epimysium

(connected to? separates?) - correct answer surrounds all the fascicles;
connected to deep fascia; separates muscle from surrounding tissue



What does the epimysium, perimysium, and endomysium make up when they come together? - correct
answer Tendon or aponeurosis



Aponeurosis

(where can it be found?) - correct answer sheet-like structure; found in
palmar and plantar regions



Aponeurosis vs. Tendon - correct answer aponeurosis: sheet-like structure

tendon: cord-like structure



Contractile unit of muscle cell - correct answer Myofibril (actin and myosin)

, What protein is the thin filament? - correct answer action



What protein is the thick filament? - correct answer myosin



What is a cross bridge? - correct answer the heads of myosin filaments



Titin protein (what two regions does it connect in the sarcomere?) - correct answer
a molecular spring which is responsible for the passive electricity of muscle; connects the Z line to the M
line



Z line (sarcomere) - correct answer D



I band (sarcomere) - correct answer C



A band (sarcomere) - correct answer D



H zone (sarcomere) - correct answer E



M line (sarcomere) - correct answer gray arrow (thick line at ends of muscle
cell)



thin filament (sarcomere) - correct answer C



thick filament (sarcomere) - correct answer B



dark band (sarcomere) (also known as?) - correct answer A band



light band (sarcomere) (also known as?) - correct answer I band

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